Extremely unhappy customer.

I to cancel my internet and was informed that my landline internet was a package. This was in end of May 2021. Eventually I got so fed up with no response from Telkom that I cancelled my complete service with Telkom, yet they still kept sending me invoices. This created the situation where I was in arrears according to them. Had they done as I requested that would not have been the case. I cancelled my service via ALL possible means, website, call centre and email. But it was never resolved. Every time you log a case, you receive an email stating that the case has resolved BUT nobody contacts you to investigate the case or inform you of the results and how they resolved the case. I'm still waiting for a response about my refund. I have requested on numerous occasions that a manager contacts me which has NEVER happened.