Telkom Fixed Line Cancellation Nightmare

I cancelled my Telkom landline on 26/07/2018, received a cancellation confirmation email with order number ********** 27A on August 8th with a cancellation effective date of 26/08/2018. It is now October and I'm still receiving invoices of R200 a month for a line that is no longer active or in use.

Please advise how long it takes for this billing to stop, and I expect to be reimbursed for all of these payments that have occurred after the 30 days notice period was met.