Telkom cancellation nightmare

We have all had our issues with Telkom and generally speaking, their service is much improved. But lately, I have had to discontinue my ADSL due to absolutely NO speed when I needs it most - EVERY DAY. I opted for Telkom's LTE deals and are quite happy with the service levels now. Unfortunately, the cancellation of the ADSL is still not actioned properly as I still get billed for it. The Telkom shop in Cape Gate has been very helpful, but they are getting tired of my face now. What the hell is wrong with Telkom that they can't sort out BASIC stuff? I am currently footing the bill for debit orders being run at the wrong time of the month for months in a row now - and for amounts NOT cleared by myself. AND I am told that my account is late etc etc. This is not on. I will stop the debit order and pay you as I see fit. Capishe?