Cancellations of service

I have been trying to cancel my Telkom line. I have called in a few times and was told that I had to cancel the ADSL portion of line. This was done before I contacted Telkom the first time. After having filled in the cancellation form (which i find ridiculous), I still get emails stating that they cannot process my request because I have to cancel the ADSL portion, but my ADSL portion was cancelled months ago. If I am charged for March, I will retract payment at the bank. Your cancellation procedures and helpfulness is utterly pathetic for a tech company! I still have not received a cancellation receipt!