Deciding to join Telkom was my biggest mistake- Appalling service.

I had three contracts with Telkom, in 2021, I was due for an upgrade. I decided to cancel all the contracts in November. It is now April, I am still being charged. I have made calls to Telkom the consultants say that the previous consultants did not cancel the contract. So every consultant I have spoken to blames the previous one. I then asked for a record of my calls to them, to this I was told I would have to lodge a formal request and that it would take a while. So I told the last consultant I spoke with that I would lodge the request, but in the meantime could she get her manager to ring me? He never called, but, I receive calls every day from Telkom to upgrade my contract. Their service is appalling.