public RefundTransactionTests()
{
const string url = "https://secure.paygate.co.za/payhost/process.trans";
const string merchantId = "10011064270"; //No 3d secure redirect on this merchantId
const string merchantSecret = "test"; //This is the merchantSecret paired with above merchantId
_paygateService = new PaygateService(url, merchantId, merchantSecret);
}