Asked for cancellation months ago, nothing happens

Hello, I emailed the service cancellation form months ago (31 December 2015), but it is still active and I am still getting billed. I called the telkom line multiple times, I went to telkom direct multiple times. No one can help me. I just want my fixed line and adsl line cancelled asap. I don't live there anymore and people can use it without my knowledge, so it is urgent.