Failed to cancel ADSL line (almost 4 months now)

I cancelled my ADSL line with Telkom on 22 August and followed up my e-mail (which Telkom confirmed they received) with a phone call and an online chat.

Since then, every month I have been billed for the line. I have contacted Telkom every time a new bill has arrived, spoken to a consultant who promised that it would be resolved, and then nothing has happened. Even better, when I e-mail the consultant to follow up there is never a response.

Even better, my phone line has been down for the last few weeks and despite logging a fault nothing has happened.

So I am being billed R500 per month for an ADSL line which I cancelled and a phone line which doesn't work.

I am about to cancel my entire line because I am so sick of this.