Pathetic service from Telkom

I have paid my account in full on 17 April after my debit order returned and I called Telkom the same day to ask for payment details as my debit order returned and was informed my payment was received no need to make payment. They suspended my account and I have been calling and emailing everyday since 17 April for them to process my payment that was made with their collections department. Now my account is still suspended and I need to pay late payment interest as they still have not processed my payment. Absolutely pathetic service and the manager is forever not available or working from home and can't take my call.