I have tried to Cancel my Telkom Line since 23 Dec

I have been trying to cancel my Telkom line since December 23rd. I have called in a few times, the first time was told that I had to get my ADSL portion of line back into Telkom, and once done was assured it would be cancelled. It was not done. Phoned a second time [from Ireland], waited for call center to answer [took over 35 minutes], was assured this time would be cancelled. It still has not been cancelled I am still getting billed for something I am not using.