Billed for a service that I do not have with Telkom.

Telkom has been billing me for a service that I have never ever had with them. A landline and for an ADSL service. I don't even have a landline at home so how can I be charged for this service. I contacted them twice and both instances I was told that it would be cancelled and the charges would be removed. I checked my ITC profile and guess what, it is reflecting as an account that I have with them!!! This needs to be rectified immediately as I am applying for a bond and do not want this showing on my ITC as I do not have this service with you. Why doesn't Telkom just get it right the first time!!!