R5000 bill from "cancelled account"

I have been trying to cancel my Telkom business account since June 2019, but despite the fact that my services are suspended my bill is escalating to over R5000 already. I have called numerous departments, but they all send me in endless circles with zero results and zero feedback. I was told that it has been escalated and somebody in management will call me but i still have not received any communication. Every time i call i speak to a different consultants who then gives me a different story. I don't know when this account will be cancelled and they will stop billing me. Does anybody know how i can resolve this issue