Unable to cancel VDSL account since October 2017

I am very dissatisfied with Telkom. I have been trying to cancel my mother's VDSL line since October 2017 with no contact from them and I am still having to pay R600.00 each month since then for something my mother is not using. I have filled out the cancellation form three times now and sent it through and the only contact I have received from them is an automated message but nothing else.

I am going to be forced to take this further as my mother cannot afford to pay for something she is not using. Looks like we will have to pay for Jan and Feb now as well since it will still not be cancelled.