Receiver REST Adapter, sync message not received

Hi,

I am working on a Proxy to REST sync scenario.

My data is example

   <CustomerDetails>

      <FirstName>name1</FirstName>

      <LastName>name2</LastName>

      <Email>pqr@xyz.com</Email>

      <ContractAccount>123</ContractAccount>

   </CustomerDetails>

   <CustomerDetails>

      <FirstName>name2</FirstName>

      <LastName>name3</LastName>

      <Email>pqr1@xyz.com</Email>

      <ContractAccount>123</ContractAccount>

   </CustomerDetails>

I want to send data via POST method at receiver side, and Client has given URL as

https://<clientdata>//WRAPI/<method>/api.php?API_SELECT=<method>&Version=2.5&Request=<method1>&User=username&Token=token&Format=XML&LibraryID=Liberary&ColumnHeaders=0&Name=TEST0107&Email=3&FirstName=1&LastName=2&ExternalRef=4&JSONPrettyPrint=0

how should I go about it?

When I test it via Chrome API or SOAP UI it works properly when I same URL with below data

Rohit,Verma,rohittest@abc.com,1234

I had used Struct2XML moduleBean but no avail to convert XML to CSV.

How can I achieve this?

Regards,

Rohit