deducting more than agreed on debit order (Late debit order)

on 06 july 2017 i phoned to change my banking details (upgraded from savings to cheque account) then they didnt deduct from the new account. phoned in again on the 4th of August and spoke to a consultant and gave me banking details to pay in manualy. I did so and September the 4th i phoned again because they still didnt deducted the debit order and now the 13th of October Telkom deducted more than triple the monthly agreed amount. It is really bad service from telkom side. also charging me for debit orders penalty fees even though it is not my fault. I WOULD APPRECIATE QUICK FEED BACK FROM TELKOM SIDE AND A RETURN OF PENALTY FEES AS IT WAS NOT MY FAULT FOR NOT DEDUCTING.

Regars Jerome