Bad service - no feedback

I have been incorrectly debited twice (February and March) by someone I have no idea who they are or an amount of R87 and some change. I called FNB to cancel the debit, which they did but I asked them for the account holders details so I can stop the debits, permanently. They said their admin department will get back to me with all the details and no one has contacted me since this issue. Yet, FNB are quick to deduct R15 for stopping the 1 debit order but can't even help to sort out a problem. Perhaps they want me to manual stop the debit order every month on my account so they can bill me R15 to make money.