When will Telkom do right by their customers?

I have been having an ongoing problem with telkom mobile since November 2015 and after having been assured that my problem has been resolved.... it still has not. I have tried calling the branch that I have opened my contract with, but their phones are constantly disconnected and when you visit them in store, they are of no help!! Is anyone on this page able to help me with a billing issue? I keep getting over charged due to a mistake that was made by the telkom consultant when I upgraded my contract, furthermore, I am now getting charged a "termination penalty" for something that I did not ask for in the first place. I am a student and I can not afford to keep getting overcharged and charged for incorrect things. Trying to resolve this issue has become very frustrating and tedious as no progress is ever made even after being assured that the issue will be dealt with. So please, if there is anyone on this page who can provide me with some assistance on the matter, it will be greatly appreciated.