Telkom - horrific service provider

After almost 20 calls, and countless wasted hours on the phone last September I canceled my account, and lodged a query to not make payment for my last months LTE service with Telkom. Not only could Telkom not ascertain whether they, or Vumatel (Vumatel had completed their side of the work) should set up my fibre line, they did not bother to cancel my service with them. I have now (9 months after the fact) been handed over to a debt collection service. This comes after the fact that I did not (if they had bothered to check their records) use any of the data they are billing me for, did not cancel my line, and did not respond to my request to NOT pay for my last months service because they could not deal with a very simple query.