Repeated unauthorised debits

There has been numerous debits against my account that I have not authorized. The amounts are always just below the R100 threshold to which I get notification (R98, R99, R99.90). I am appalled by the lack of action by FNB to notice this clear ***** regardless of alerts. What is annoying is the amounts I am charged for unsuccessful collections and/or stopping the debits.<br> <br> How difficult is it to notify me when a debit is set up against my account so I notify you of any possible *****? I am exhausted from dealing with you