Telkom not cancelling contract

Why is it so difficult to cancel an expired contract with Telkom? I have contacted and emailed Telkom numerous times since the 06th of May 2015 to cancel my contract but nothing has happened since. Apparently it was escalated by the Call Centre.<br> <br> Now I've paid twice for something that I do not want and requested to be cancelled. Please could you urgently look into this problem, otherwise I will have no choice but to cancel the debit order.<br> <br> The number I wish to cancel is: ***