Error transaction made

I made a transaction in error from cheque account to a credit card that had been closed, from there started my maze of a journey calling almost every department within fnb, to get assistance, countless numbers I've called eventually I was told to send an email to the legal department, which has a 15 day turn around time, I was the prescribed days still no communication, I then called in again and was give the same maze of a journey with no success, the frustrating thing is the lack of communication or clear direct how the situation can be resolved...