Telkom ignores my requests

I have been trying to cancel my landline for the last 3 months. I have been into the stores and I have tried using the web portal. But each month I get billed, and then when I complain I get told that I have to be fully paid up. So I pay and I try and cancel and nothing happens. I need to keep my adsl but I do not need my landline. How the heck do I get this to happen? Come on telkom. This us bullsh*t