BILLED MONTHLY FOR NO SERVICE RENDERED

I had a Telkom account, in March 2018, cables were ****** in the area, in June 2018 I was notified after numerous follow up calls by Telkom that they will not replace the cables. I was then sent a HOW TOO guide to go into the internet to cancel the account I had with them. I did this ON THE 4TH OF June 2018. To date Telkom still bills me. I now call every month to dispute the bill. Telkom keeps me on the phone at least an hour at a time. Not sure what to do. Frustrated with TELKOM.