**** Working getMUBets ****

<SOAP-ENV:Envelope xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" 
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ZSI="http://www.zolera.com/schemas/ZSI/" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<SOAP-ENV:Header></SOAP-ENV:Header>
<SOAP-ENV:Body xmlns:ns1="http://www.betfair.com/publicapi/v5/BFExchangeService/">
 <ns1:getMUBets>
  <ns1:request>
   <header>
    <clientStamp>0</clientStamp>
    <sessionToken>WmFbamLYVgiubRLKsV+6qGVBs+yxO47LEyID/vInjLg=</sessionToken>
   </header>
   <betStatus>MU</betStatus>
   <marketId>0</marketId>
   <betIds xmlns:ns2="http://www.betfair.com/publicapi/types/exchange/v5/">
    <ns2:betId>4543575075</ns2:betId>
   </betIds>
   <orderBy>None</orderBy>
   <sortOrder>ASC</sortOrder>
   <recordCount>1</recordCount>
   <startRecord>1</startRecord>
   <matchedSince xsi:nil="1"></matchedSince>
   <excludeLastSecond>true</excludeLastSecond>
  </ns1:request>
 </ns1:getMUBets>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

**** Example Available From Betfair ****
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
 <cancelBets xmlns="http://www.betfair.com/publicapi/v3/BFExchangeService/">
  <request>
   <header xmlns="">
    <clientStamp>0</clientStamp>
    <sessionToken>xxxxxxxxxx</sessionToken>
   </header>
   <bets xmlns="">
    <CancelBets xmlns="http://www.betfair.com/publicapi/types/exchange/v3/">
     <betId xmlns="">123456789</betId>
    </CancelBets>
   </bets>
  </request>
 </cancelBets>
</soap:Body>
</soap:Envelope>

**** A Message I managed to Get out using "cancel.bets = BetIDs" ****
<SOAP-ENV:Envelope xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ZSI="http://www.zolera.com/schemas/ZSI/" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<SOAP-ENV:Header></SOAP-ENV:Header>
<SOAP-ENV:Body xmlns:ns1="http://www.betfair.com/publicapi/v5/BFExchangeService/">
 <ns1:cancelBets>
  <ns1:request>
   <header>
    <clientStamp>0</clientStamp>
    <sessionToken>ieRebsIdo2x96UwslvjgW9XQtIv2IUM60bTcz7p1DCQ=</sessionToken>
   </header>
   <bets xsi:nil="1">
   </bets>
  </ns1:request>
 </ns1:cancelBets>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>