Awful service from Telkom when trying to cancel a fixed line

My father retired last year November and we cancelled their telkom work line and ADSL line. We followed the steps they gave us, filled in the forms they required, only to receive an account of over R3000. I was told to log onto the telkom portal which I did and that didnt work so I spoke to 3 different consultants over the last 4 moths trying to sort out this mess. Up to date, the line is still being charged and we now sit with a heavy account for a line that was meant to be cancelled by telkom in January already. The service received from Telkom has been pathetic and no one seems to be able to assist with anything.