WHY CAN I NOT CANCEL?

On 27 March this year I sent in my cancellation form to cancel my Telkom phone line (for ADSL).

Today is 20 November and according to my accounts, Telkom is still billing me every month. I have made at least 20 calls to Telkom over the months, to follow up with this, to get my line cancelled, and to get refunded my monthly fees as well as my initial deposit.

I've heard nothing. Please contact me to resolve this issue? I cannot keep chasing your call centre staff who do not follow through.