Creditcard payment.

In 2018 I purchased a subscription from Wix.com. It was on special and cost about R 1 500. That was around may or June. Then this year 1 July another transaction went off for R 3 300. I tried to cancel it with Wix, but couldn't get that done. Now I cant get into the website to cancel future payments. The strange thing is, that my credit cards both changed last year around October, so, strictly speaking the transaction shouldn't have been able to go through, because that credit card was cancelled. Please explain? We reported the matter the same time that it happened and I still don't have ANY feedback from FNB. Now I have to pay interest and a minimum payment on something that shouldn't have gone through in the first place.