Cancellation Frustration!!!

I have been trying to cancel my Telkom landline for 2 months now. They apparently cant cancel it due to an open DSL account, which does not exist. They cant tell me where this account is. You can only cancel a service online, but once a request is log, you cant log another. I have been in touch with two different individuals by email, but neither of them can reply on emails. TELKOM JUST DONT GIVE A DAMN!!! I will be cutting the line myself and will not be paying for any services as it seems I need to cancel the line myself.