BANKING COMPLAIN

I HAVE STOPPED MY DEBIT ORDER ON CELL C FOR THE AMOUNT 100 TO 1000. DEBIT ORDER STILL WENT THROUGH FOR R903. I PHONE BANK HOLDING ON FOR HOURS, SPOKE TO LADY ASKING TO REVERSE THIS DEBIT ORDER. SHE TOLD ME FOR SECURITY REASON I MUST PUT IN MY LAST SIX DIGITS OF MY BANK CARD AND PIN NUMBER. TRYING TO DO THIS PHONE CANT DO THIS. TELLING ME TO GET ANOTHER PHONE TO DO THIS. I TRIED MY CELL PHONE BUT WITH THE RESPONSE TAKING SO LONG MY PHONE GETS GOT OFF. THEIR IS NOT OTHER PHONE TO USE. WHAT MUST I DO. I CANNOT TAKE OF WORK TO GO SORT THIS OUT. MY PHONE NUMBER IS *** MY ID NUMBER IS ***. MAYBE YOU CAN LOOK INTO THIS AND SORT IT OUT FOR ME. MY OTHER OPTION IS TO JUST CLOSE THIS ACCOUNT AS I HAVE HAD ENOUGH OF THIS. WITH THIS DEBIT ORDER GOING THROUGH FROM CELL C. MY OTHER DEBIT ORDER WAS RETURNED BECAUSE OF NOT ENOUGH FUNDS AND I WAS CHARGED OVERDRAFT FEES. THIS IS SO ANNOYING. I HATE FNB.