public static async Task <ResponseModel> ProcessTopup(RequestModel requestModel)
{
//ModelState Valid
var responseData = new ResponseModel();
var requestXmlFormatModel = requestModel.ConvertRequestToXmlModel();
var requestModelToXml = requestXmlFormatModel.ConvertModelToXml();
var responseAPIData = await Send(requestModelToXml);
var outputData = responseAPIData.ByteArrayToOject <ResponseModel>();
return(outputData);
}