Worst call centre ever and I want my money back.

Telkom's call centre is the worst I have ever encountered. For the last 3 months I have been trying to change my banking details for my cellphone contract's debit order, this has turned out to be a nightmare affecting my previous bank account with unnecessary excess bank charges for failed debit orders and with telkom charging me a rediculous rejection fee that is not my fault. For the past 3 months I have called in to make sure all the new banking details are in order and I was assured that by October the debit will go out from the new account and I got a shock when the debit order went out from my old account and rejected, I called again and they said the call centre agent made a mistake and put cheque account instead of savings thats why it didnt go through the new account. Last week I got another shock when my invoice came with a rejection fee of +200.00. I called in again to get answers which i was given a run around after an hour on hold on their call centre, I was told that there is a problem with their system so I should go to my bank and ask for a confirmation letter that the account belongs to me and the call centre agent was supposed to log a complaint for the rejection fee because clearly i am not at fault and i never received a reference number. On Monday I went ahead and did a manual payment because apparantly my banking details will be effective next month after rectifying the mistakes. This morning again, I woke up to another shock in my account as telkom has miraculously managed to debit from my new account before I could even being the confirmation letter from the bank, so they have taken their money twice plus the rejection fee that i should not be accountable for. After another long awaiting time calling them; i am yet to receive a feedback. This is so annoying and I am tired of calling them for the same issues.