Complete incompetence

I requested a line cancellation in February. It was \formally"cancelled on the 19th on Feb. I have the corresponding reference numbers. I've been billed for every single month thereafter. It's not like Telkom forgot to cancel the line and I could still use it. The service has been removed and they are still billing me! I've called in on numerous occasions to address the problem but I get the usual Telkom run around. ( they'll call me back"