Faulty transaction interface

I created an ad to sell my vehicle on Autotrader. I paid via credit card and the next screen said there was an error with the transaction. So I paid again. The same message came up again and the ad was not posted. The ad is still in the shopping cart.<br> <br> Thereafter I received an email from MyGate confirming that the transaction was indeed successful.<br> I logged into my internet banking and found that both payments had in fact been processed. I phoned Autotrader call centre and was told I need to send the emails from my bank confirming the payment.<br> I do not receive emails from ABSA for credit card payments, only cheque transactions.<br> <br> Now I sit with the problem of - how do I get my money back and the ad posted because I've already paid twice.<br> <br> This is very stressful for me.<br> <br> I can easily log into my banking and do a screen shot of the transactions but they want emails.<br> <br> I am disappointed that the system basically ****** me.