Can not reverse a debit order I allready paid now I must phone FNB CUSTOMERS SERVICES TO REVERSE THIS DEBIT ORDER AND THEY WILL CHARGE MEEXTRA R50 TO DO IT

I did want to reverse a debit order of Mtn that I allready have paid by EFT BUT fnb have decided to block the function to reverse this debit order. If I phone FNB THEY WILL CHARGE ME R50 TO REVERSE THIS DEBIT ORDER. FNB TAKE AWAY THE RIGHTS OF THE CONSUMER TO CONTROL THEIR MONEY AND FORCE THEM TO CALL THEIR CALL CENTRE TO MAKE EXTRA MONEY FROM CONSUMERS