Telkom - *********** its clients.

I have an existing contract with Telkom. The contract cellphone number is *** and my account number is ***. Early January I visited Telkom Branch in Highveld mall. I cant remember the exact date but the intention was to inform Telkom about the change in my banking details. They requested certain documentation in order for them to assist me. I supp**** all the documentation and they advised me that end of January instalment will be debited from my current bank account(Absa) however they will make the changes on the system so that the end of February installment is deducted from my FNB account number. End of February and up until to date Telkom has not bothered to update my account details on their system. They in fact tried to debit the old account number which I closed in mid February, obviously they were no funds to cater for the debit order. On top of that Telkom has the audacity to charge me rejection fee of R200 for a mistake on their side. it is not my fault that they did not update my banking details on the system as I informed them on time about the change in banking details and supp**** them with relevant document including proof of the new bank account. end of March installment will also be returned unpaid as my absa account has been closed. can the *********** personnel from Telkom update my details on the system and deduct their monthly installments so I have this stupid account up to date and so not to mess up my credit record. I wrote several emails to Telkom but they chose to ignore me. Telkom is the worst service provider practicing ********* principles e.g. making money from their clients by penalizing them on a mistake committed by Telkom themselves. should Telkom be interested in fixing their mess, my email address is ***