Telkom refuses to cancel my contract

Telkom is refusing to cancel two of my contracts with them. I first went in-store to cancel and a lady by the name of Egnes Ponagalo (Centurion branch) told me cancelations are now done ONLY online. I tried to do that and realised she was speaking loads of ****. A callcentre agent told me you cancel via completion of a form. I then completed the cancelation form and submitted 28 February. They all stated it takes 21 days to cancel. I have since made numerous call to check status, and each time nothing has happened. Forwarded cancelation form again to Sinethemba at Centurion direct, on two occasions he said he would help. I check today and both numbers are still active. I now don't know what to do. Telkom is a cheat. They force us to keep contracts we don't need. I am taking this up with the ombudsman.