UNAUTHORIZED DEBIT ORDERS

I HAVE REQUESTED NEDBANK PERSONAL LOANS SO MANY TIMES TO AJUST MY DEBIT ORDER DATE HOWEVER WHOEVER THTA I SPEAK TO ALWAYS ASSURES ME THAT THEY WILL FIX IT HOWEVER IT IS NEVER DONE AND ON A MONTHLY BASIS THEY INCORRECTLY DEBIT MY ACCOUNT THEN GO BACK AGAIN RANDOMLY IDURING THE MONTH AND LEAVE MY ACCOUNT WITH UNECESSARY BANK CHARGES , FOR THE PAST 3 MONTHS NEDBANK HAS LEFT ME WITH R110 BANK CHARGES FOR EACH UNPAID DEBIT ORDER AND I PREVIOUSLY ADDRESSED THIS A THE LAST CONSULTANT SAID SHE WILL REQUEST FOR THE CHARGES TO BE REVERSED BUT THAT IS STILL NOT DONE