cancel my line already!?

Cancelled a line on the November, received notice that this line was cancelled. Line is still active and I'm still being billed for it 4 Months later. I've been calling telkom every 2 weeks or so to enquire about this matter, the consultants say they "processed" and even supply a reference. Yet the line and account still runs, Today I contacted telkom to find out that someone has cancelled my cancellation request. And they are processing it again, I suspect this is going to go on for years