Telkom very bad customer service

Telkom debited the wrong account because they had the wrong banking details, but when I took out contract I gave them all the correct information yet they still debited the wrong account. I called in to customer service and gave them the correct banking details, made a arrangement to make a manual payment witch I did agent assures me that line wont be cut... a week later my line gets cut.. call in again I speak to a manager he tells me that his going to listen to previous call and get back to me.... still hasn't gotten back to me and its been more that two weeks now... Telkom debits the right account but my line is still cut I call in and they tell me fist it takes 5-6 working days when debt collectors debit the account phoned in today they tell me 7-14 working days.. my issue is that Telkom made a mistake I tried to rectify their mistake but yet I'm held liable for a mistake made on their side and to get problem sorted I have to revert to hello peter because Telkoms service is so poor