Cell c not attending to biliing query

We have been having problems with our contracts for the last 5 months and cell c can not seem to sort out the problem, i called in on the 11/11/15 to query our bills, a case is opened and they say we will be contacted within 2 days, I waited a week and no call. Called in again on 17/11/15 and was told that my query would be marked as urgent and i would recieve feedback within 2 days, still no call. Called in again on the 23/11/15 and was promised feedback by the end of the day. It is now 24/11/15 and STILL no call. This is happening every month and surely someone at cell c can fix this simple billing error. My ref no.***, my husbands ref no ***. Both of the contracts are the same and have the same problems except that my husband cannot buy data bundles and is being charged out of bundle rates at R1 per mb!!. It seems that the only way we can get any response out of cell c is to post on hello peter!