Serious Complaint

I've been trying cancel my Telkom internet since May/June 2021, without any success. I have numerous reference numbers which I get every time I phone enquiring about my invoice that I have received. I get informed that my account has been suspended. They owe me money for the cancellation which they to date have still not done. Every time I call asking for update on my cancellation they provide me with a new reference number. I'm at a loss as how to resolve this issue. If anybody has any advise it would be greatly appreciated. The SENIOR management obviously doesn't care what happens in their department seeing that everyone works from home.