Cannot cancel my Telkom Line since 21 April 2017!!!

<p>I have been trying to cancel my Telkom since 21 April 2017. I've sent my cancellation form + ID to servecancellation.co.za on 21 April 2017, then followed up on 2nd June 2017 and was asked to resend this to the agent which I did (no response yet). I followed up on 4 July 2017 and was asked to resend this to the agent which I did (no response yet). Eventually I stopped the debit order at the end of July 2017, and now I am being bugged by Telkoms credit department for R199 which I am supposed to have stopped paying at the end of May 2017. Please can you cancel this urgently and refund me what I've overpaid as my credit record is now being affected.</p>