Telkom billing me for a cancelled line.

I am fed up with Telkom. I had a business line with them. Cancelled my ADSL line in July 2022. Received notification that it was cancelled. In September they are still billing me for the ADSL. So I cancelled the ADSL again in November 2022. So they cut my landline as well. After phoning them they advise me that my ADSL line is part of my landline so they had to cancel both and it will take 10 working days to reconnect the line. I have a business so this is not acceptable. So I decide to get a cellphone for the business and not to reinstate the line. So now we are in February and Telkom is still billing me a R150 per month for soft cap. So I phoned and I mailed and they say that I didnt specify I wanted to cancel it. What is this??? Why are they taking money for services not used. If my line is canceled then everything should be cancelled? They haven't paid back the money they took for ADSL for the month of September, October and November and they are still billing me.