Exorbitant charges with no service

I called the call centre sometime in February and put a stop order on a card authorised debit order, the consultant advised it can be done and stopped the debit order. Then today the debit order goes off and they have a nerve to still charge me the R 55.00 stop order fee, How can a bank do this to their clients. We are not protected in any way possible. all you ever see if charges after charges. I even had an unauthorised debit order go off my account in Janaury which I was charges for. This is totally unexceptable.