Can't cancel ADSL even after following procedure

My 2 year contract for ADSL with Telkom was due to expire on 08/01/2016 and I received a letter from Telkom stating that if I wish to terminate the contract then I should give them written notice a month in advance. I knew that Telkom would come up with additional requirements if I just followed that letter, so I made the effort to call the centre to verify the procedure and I was right : just written notice wasn't enough - they said that I should fill in a form and email that and my ID to the cancellations department. So I made sure that I sent the form and my ID to the email address specified and this was done 1 month before expiry. Do you think that Telkom can do their job even if you followed all their Procedures?? I received an automated email saying that I will receive a call shortly. So one month passed and I received no call nor did my ADSL get switched off. Thereafter I called the call centre and was told to call the cancellations department - this number didn't work... Obviously! I then called the call centre again and they say that they cannot help but they will put a note on the file. Nothing has happened since. Terrible service is an understatement!