No refund been done after almost a whole month

Hi, I saw my statement one day and saw that I owe money all of a sudden when I know I have paid up my account fully. I phoned in on 2510/15 16:00 and spoke to a man named Linda or Salinda ***. He told me that he would sort the problem out and get my money refunded on the account, Cell c airtime has been added on my account and on a cell number I don't know about. I have a Vodacom account. The cell number is ***. I have phoned in almost each and every week speaking to different consultants and they all say they would help me and get my account sorted out but I just don't get a call back from the RMCS department so that they can process my refund. I phoned the following days 16/11/15 10:35, 18/11/15 spoke to Nomvula ref ***9 from Edgars and carol from Admin department ref ***, 26/11/15 spoke to Brian from durban Edgars and then Fikhona RMCS department ref ***, I stopped phoning Edgars because then I can phone RMCS directly on *** Spoke to Sibongile on 26/11/15 and then a Praise. I then told them if I don't get a call back within 24 hours then I'm going to hallo peter. I still did not get any call. Please can you assist urgently. <br>