Cancellation for 2016 still not done

Good day

We have a telkom line which we have requested to be cancelled in 2015. This has still not been done, we go from pillar to post with telkom to get the line cancelled. We have subsequently sent through another cancellation letter and still have no response. Customer service is pathetic.

On the website there is a function called Telkom chat which does not work.

We are being charged for this landline which is not being used by us

Kind regards