FNB-debit order

I was told previously that you will stop a debit order however the same issue happen again. I will not call the call centre or use the fnb chat to raise the issue because I had no help in doing so the last time. All they said they couldn't a reversal for a certain debit order. I'm sick and tired of complaining. The agents cannot carry out a simple task or follow a simple request. I want a reversal done and any future debits going off to stop. I was told the debit order was stopped, only to find out this was not true. This is my account, how hard is it for FnB to follow a simple task. I can't keep complaining about this. I am really disappointed.