Telkom destroyed my Experian credit rating

I cancelled my Telkom phone line and ADSL service in September 2017 using Telkom's online self service options. I received emails from Telkom confirming both cancellations. After the scheduled 30-day notice period I received no further emails from Telkom. I wasn't expecting to receive any emails after that period anyway, so nothing seemed out of the ordinary. It would appear that Telkom did not cancel the 2 services and continued billing me but also not sending any email statement notifications or arrears notices when no payments were made. In July 2018, the account was written off and an adverse score was sent to Experian, which has damaged my credit rating beyond belief and affected current business. Telkom not only owes me an apology for not cancelling the services I requested, but also has to reverse the adverse score they sent to Experian. This is why Telkom will never be able to provide Superlative Service. Totally unacceptable.