Telkom Disastrous Service and Cancellation.

After numerous times of Telkoms' ADSL and Fibre just not working only to be charged for reactivation, I have tried to cancel with no progress since June (cancellation effective date of 31/07/2018). I have phoned in and cancelled. I have cancelled online. I have spoken with David Stellenberg (Telkom employee) and cancelled over the phone and email as well. It is now October and I'm still receiving invoices of R 2000 a month for a line that is no longer active or in use ( I don't even live at the same address anymore).

Please can someone assist with the cancellation of my Telkom account. I expect my account to be back dated to the requested cancellation date.