Telkom are rogues

At the end of July, Telkom had once again debited the incorrect account which had obviously had bounced because I did not have funds in that account. I have been trying to change the debit order details with them since December 2021 and no one seems to be able to capture the correct details. Now I am being charged an extra R200 for something that is not of my fault. I have spoken to two very rude and unhelpful people by the names of Prudence and Offense in which they have were of no help. I am not willing to pay this amount and I want it to be reversed. I have asked to speak to a manager and that they were unable to provide. At the call that I have made at the beginning of the month, the lady sad that she will have it reversed in which according to telkom they have no record off.