Don't do business with TELKOM

I'm attempting to cancel my Telkom line because the line quality is degrading and Telkom says it won't be upgraded because they focussing on fibre.

Right so I cancel my landline online and they call me to make sure I want to cancel etc .....all good but then I'm informed that I need to cancel my ADSL line first. I have cancelled my ADSL line I tell them and I provide a reference number for the ADSL cancellation. No they can't find the reference number blah.....blah.....cancellations will call me back....blah....blah......DID CANCELLATIONS CALL ME BACK......obviously not. All this leaves me to believe that Telkom go out of their way to make cancellations difficult and to drag them out in order to keep billing you for as long as possible. I JUST WANT THE DAM LINE CANCELLED......HOW DIFFICULT CAN THAT BE.