MTN bills for services it fails to render

On the 8th of October 2015 I reported an issue to the MTN Call Centre pertaining to one of the mobile phones on my contract which was not receiving the Airtime, Data & SMS bundles being paid for on a monthly basis. A reference number: *** was provided. To date MTN has failed to resolve this problem, yet continues to bill me for services it has failed to render. On Friday 23/10/2015 I went to the Clearwater branch to attempt to resolve the issue in person. The branch is unable to assist as the staff at this branch are downright rude and appear to lack the necessary training to even access this fault reference number on MTN's useless systems. As things stand, MTN has failed to resolve this issue and are therefore in breach of their contract with me, because they have been debiting my account for many months now for Data, SMS and airtime which they have failed to provide. Sending emails or contacting the call centre is a waste of time because they are incapable of responding to any email and I am not prepared to waste more time going to an MTN branch office who either are too lazy to render service, or don't know how due to lack of training. Sort this out MTN!