TELKOM IS NOT CANCELLING MY ACCOUNT AND CAN NOT BE REACHED

I have been trying to cancell my telkom account and adsl, since I got Fibre in Oct last year, they keep debiting my account and I can NEVER get hold of them on the phone. The chat on the NEVER works. They phone me all the time to sell be fibre but then can never help me with my cancellation I have given up now. Not sure what else to do.