Hi Philip, when I did the test transactions this morning, it all went through and I got the screen that says successful transaction, no return, nothing entered into the zc database and the items still in my cart, I figured this was because I was in test mode. I have the debugging enabled but nothing was emailed, except the transaction email from worldpay that I would get as a customer.

I will keep testing as it is a very new account LOL I have only just gotten the emails that they received my banking forms etc, so hopefully it is as you suggested and needed some time :)