No billing resolution despite compliant

I had an ADSL line with Telkom which I terminated in Nov 2015 for failed service - unresolved technical failure. I concurrently decided to migrate to a Telkom wireless broadband service capped at 50gb. I requested for multi sim to allow access across several devices, for the same data account. <br> <br> What happened: (a) Telkom has continued to bill me a monthly amount of ZAR 268 on the previous service despite my termination (***); (b) Telkom has been overcharging me for my new mobile broadband line (***), billing me for 2 lines instead of one line with multi sim. Realizing this issue, I visited the Rosebank branch and raised the issue. They accepted that there had been an error and promised to resolve. However, till now, I have seen no credit note (reversing over billed amount) and worse the billing for two seperate mobile lines instead of one carried on into Feb 2016.<br> <br> What I am seeking: (a) stopage of billing on my old ADSL account and credit for the over billed sum; (b) Immediate correction of the billing issue on my mobile broadband account and credit for the wrongly billed amounts. Finally, a confirmation of the action taken in resolving the issue