PATHETIC CUSTOMER SERVICE

Once again I am fighting a losing battle against this company. I don't know whether I should cry of break something out of frustration. I have a contract as well as a pre-paid number with them and for 2 weeks now I have been trying to take out a contract on the pre-paid number. I keep getting told there is a flag on my account but nobody is able to tell me what or why. I can't recall how many call center agents I have spoken to, but it is a few dozen over 2 weeks. Of these at least 4 have PROMISED SOLEMNLY to get back to me within 1 hour, needless to say this never happened. I have driven 160 kms to my nearest CellC store with all my documentation and have hit the same blank wall. Can SOMEBODY in authority at this institution PLEASE get back to me so this issue can be resolved.