annoyed

My debit order for my credit card did not go off due to fnb not debiting me and then they sent me an sms saying I didnt make payment as agreed. I called them and was told to do a transfer which I did but a manager was supposed to call me back to confirm that it was the banks error not mine. no one called me. I called them again to clarify the matter and was told they cannot stop a debit order going off again even though I made the payment I was asked to make. I am frustrated trying to get someone to assist me in a manner I am happy with and annoyed that I wasn't called back as promised.