unauthorised debit order

It seems FNB enjoys me reporting them on Hello Peter. 2 minutes fame. For the same offence. Only this time they had to put icing on the cake. My petro and credit card are on special arrangements which I have been under for more than a year now. They both require R1000 a month on the arrangement. Now FNB searches for money in all my accountso and decides to take an extra R1164 which I am to use for fuel to school and grocery for the month. I am left with almost nothing and this is after I spoke to a lady who called 2 days ago and still put the arrangement on. Spoke to Petros yesterday but he is not concerned about what I am telling him and he didn't bother to return my call as I got disconnected while talking to him and called him back only to stay on hold forever. I don't want anyone calling me with lousy stories and explanations, I just want my money refunded in full or FNB will never get a cent from me until this is sorted.