worse customer service

I went to Telkom shop in Knysna to ask about my cancellation of my contract and the lady said I can just phone for it to get cancelled.When I phoned in May for Cancellation in June the guy said everything is in order and gave me his name as I reference and I even asked him if thats all I need and he said yes.I asked him If i have to call again to follow up, he said no the cancellation is done.When I phoned telkom about my cancellation again because of the money they deducted 3 months after it has been cancelled they said my contract has never been cancelled.I told the lady but check on your records and she even asked her boss and they could see that I did contact for Cancellation. They only cancelled the contract then and billed me again.I went to my bank to reverse the payment because it was unfair of them to bill me after it was their problem and not mine.They tried few times to bill me in few days and I didnt have money in my account which my bank deducted alot of money for the deduction that bounced.They billed me again after pay date which I just left it as is.R836 for a rooter of 200 monthly .Im done with telkom not the 1ste problem I have with them