Can't Cancel Telkom Services/Line

Due to the fact that I paid for a 8mb/s line and could get (on a good day) 2 mb/s, I decided to move elsewhere. I sent my notice of cancellation on 16 December 2017, requesting all services and the account to be terminated with immediate effect, (knowing I would have to pay for an extra month - as per t's & c's).

As expected I received my account and my account was debited for the extra month.

I thought this was the end and that I was rid of Telkom. Needless to say, I was wrong. After having been provided with no less than 6 e-mail addresses to which to send the cancellation documentation, dated 16 December 2017, and having spent the most of the days on the phone to obtain same, the line is still not cancelled. It is now 05 September 2018 and my Telkom line is still active and the bill keeps getting bigger.

I am refusing to pay anything further and I look forward to them instituting legal action for the current arrear account.