<?xml version="1.0" encoding="utf-8"?>
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  <!-- INTEGIX by Ez-XBRL -->
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  <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" roleURI="http://www.xbrl.org/2009/role/negatedNetLabel"/>
  <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel"/>
  <roleRef xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" roleURI="http://www.xbrl.org/2009/role/netLabel"/>
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    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_CliffordStarkeMember" xlink:label="loc_zstk_CliffordStarkeMember_2"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_CliffordStarkeMember" xlink:label="loc_zstk_CliffordStarkeMember_3"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_DanielReisFariaMember" xlink:label="loc_zstk_DanielReisFariaMember_4"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_DanielReisFariaMember" xlink:label="loc_zstk_DanielReisFariaMember_5"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_DanyVaimanMember" xlink:label="loc_zstk_DanyVaimanMember_6"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_DanyVaimanMember" xlink:label="loc_zstk_DanyVaimanMember_7"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_DanyVaimanMember" xlink:label="loc_zstk_DanyVaimanMember_8"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_Director1Member" xlink:label="loc_zstk_Director1Member_9"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_Director1Member" xlink:label="loc_zstk_Director1Member_10"/>
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    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_Director2Member" xlink:label="loc_zstk_Director2Member_12"/>
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    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_HusseinRakineMember" xlink:label="loc_zstk_HusseinRakineMember_16"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_HusseinRakineMember" xlink:label="loc_zstk_HusseinRakineMember_17"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_LuisMerchanMember" xlink:label="loc_zstk_LuisMerchanMember_18"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_LuisMerchanMember" xlink:label="loc_zstk_LuisMerchanMember_19"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_LuisMerchanMember" xlink:label="loc_zstk_LuisMerchanMember_20"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_MatthewCohenMember" xlink:label="loc_zstk_MatthewCohenMember_21"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_MatthewCohenMember" xlink:label="loc_zstk_MatthewCohenMember_22"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_MatthewCohenMember" xlink:label="loc_zstk_MatthewCohenMember_23"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_MichaelHeinrichMember" xlink:label="loc_zstk_MichaelHeinrichMember_24"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_MichaelHeinrichMember" xlink:label="loc_zstk_MichaelHeinrichMember_25"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_SammyDorfMember" xlink:label="loc_zstk_SammyDorfMember_26"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_SammyDorfMember" xlink:label="loc_zstk_SammyDorfMember_27"/>
    <loc xlink:type="locator" xlink:href="zstk-20251231.xsd#zstk_SammyDorfMember" xlink:label="loc_zstk_SammyDorfMember_28"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_CliffordStarkeMember_0" xml:lang="en-US">Clifford Starke [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_CliffordStarkeMember_1" xml:lang="en-US">This member stands for Clifford Starke.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_zstk_CliffordStarkeMember_2" xml:lang="en-US">Clifford Starke [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_DanielReisFariaMember_0" xml:lang="en-US">Daniel Reis-Faria [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_DanielReisFariaMember_1" xml:lang="en-US">Daniel Reis Faria [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_DanyVaimanMember_0" xml:lang="en-US">Dany Vaiman [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_zstk_DanyVaimanMember_1" xml:lang="en-US">Dany Vaiman [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_DanyVaimanMember_2" xml:lang="en-US">This member stands for Dany Vaiman.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_Director1Member_0" xml:lang="en-US">Director 1 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_zstk_Director1Member_1" xml:lang="en-US">Edward Woo [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_Director1Member_2" xml:lang="en-US">Person serving on board of directors.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_Director2Member_0" xml:lang="en-US">Director 2 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_zstk_Director2Member_1" xml:lang="en-US">Manfred Leventhal [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_Director2Member_2" xml:lang="en-US">Person serving on board of directors.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_zstk_HusseinRakineMember_0" xml:lang="en-US">Hussein Rakine [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_HusseinRakineMember_1" xml:lang="en-US">Hussein Rakine [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_HusseinRakineMember_2" xml:lang="en-US">This member stands for Hussein Rakine.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_LuisMerchanMember_0" xml:lang="en-US">Luis Merchan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_zstk_LuisMerchanMember_1" xml:lang="en-US">Luis Merchan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_LuisMerchanMember_2" xml:lang="en-US">This member stands for Luis Merchan.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_zstk_MatthewCohenMember_0" xml:lang="en-US">Matthew Cohen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_MatthewCohenMember_1" xml:lang="en-US">This member stands for Matthew Cohen.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_MatthewCohenMember_2" xml:lang="en-US">Matthew Cohen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_MichaelHeinrichMember_0" xml:lang="en-US">Michael Heinrich [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_MichaelHeinrichMember_1" xml:lang="en-US">Michael Heinrich [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_zstk_SammyDorfMember_0" xml:lang="en-US">Sammy Dorf [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_zstk_SammyDorfMember_1" xml:lang="en-US">This member stands for Sammy Dorf.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_zstk_SammyDorfMember_2" xml:lang="en-US">Sammy Dorf [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_CliffordStarkeMember_1" xlink:to="lab_zstk_CliffordStarkeMember_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_CliffordStarkeMember_2" xlink:to="lab_zstk_CliffordStarkeMember_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_CliffordStarkeMember_3" xlink:to="lab_zstk_CliffordStarkeMember_2"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_DanielReisFariaMember_4" xlink:to="lab_zstk_DanielReisFariaMember_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_DanielReisFariaMember_5" xlink:to="lab_zstk_DanielReisFariaMember_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_DanyVaimanMember_6" xlink:to="lab_zstk_DanyVaimanMember_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_DanyVaimanMember_7" xlink:to="lab_zstk_DanyVaimanMember_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_DanyVaimanMember_8" xlink:to="lab_zstk_DanyVaimanMember_2"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_Director1Member_9" xlink:to="lab_zstk_Director1Member_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_Director1Member_10" xlink:to="lab_zstk_Director1Member_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_Director1Member_11" xlink:to="lab_zstk_Director1Member_2"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_Director2Member_12" xlink:to="lab_zstk_Director2Member_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_Director2Member_13" xlink:to="lab_zstk_Director2Member_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_Director2Member_14" xlink:to="lab_zstk_Director2Member_2"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_HusseinRakineMember_15" xlink:to="lab_zstk_HusseinRakineMember_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_HusseinRakineMember_16" xlink:to="lab_zstk_HusseinRakineMember_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_HusseinRakineMember_17" xlink:to="lab_zstk_HusseinRakineMember_2"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_LuisMerchanMember_18" xlink:to="lab_zstk_LuisMerchanMember_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_LuisMerchanMember_19" xlink:to="lab_zstk_LuisMerchanMember_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_LuisMerchanMember_20" xlink:to="lab_zstk_LuisMerchanMember_2"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_MatthewCohenMember_21" xlink:to="lab_zstk_MatthewCohenMember_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_MatthewCohenMember_22" xlink:to="lab_zstk_MatthewCohenMember_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_MatthewCohenMember_23" xlink:to="lab_zstk_MatthewCohenMember_2"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_MichaelHeinrichMember_24" xlink:to="lab_zstk_MichaelHeinrichMember_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_MichaelHeinrichMember_25" xlink:to="lab_zstk_MichaelHeinrichMember_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_SammyDorfMember_26" xlink:to="lab_zstk_SammyDorfMember_0"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_SammyDorfMember_27" xlink:to="lab_zstk_SammyDorfMember_1"/>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_zstk_SammyDorfMember_28" xlink:to="lab_zstk_SammyDorfMember_2"/>
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