Failed to stop ********** transactions on my Acc

Since last year I've been seeing ***** transactions for R99 on my Transaction history. So I've visited the FNB branch several times to stop these transactions and all they have been able to do was to reverse and stop the transaction but the following month I get another transaction for the same amount (R99) under a different ref/description. At beginning of May(2015) I was at FNB to stop a transaction that happened on 28 April 2015 (99) and now there is a new Transaction that happened on 25 May 2015 (R98) and I'm now tired of this and thinking of cancelling all my accounts with FNB as I don't feel safe/protected by the bank and they not doing anything to address my problems and this seems to continue forever so as a customer I'm not happy at all.