Cannot cancel Telkom line

I have cancelled my Telkom fixed line line, and I am still receiving monthly invoices. I got through to customer services eventually, they just created a dispute. I am still receiving invoices from Telkom. The amount is rising with interest. The account was cancelled in September 2015. I have sent emails with all my details to the prescribed email adresses, I have also sent forms with my ID etc. <br> <br> This is my second complaint on hellopeter about this matter. Nothing has been done. <br> <br> My reference number for the cancellation is SM168516. My dispute reference number ***0.