Data connection not working

Whenever the CellC network is not available, it is supposed to roam on Vodacom. My one CellC number does not connect to data services when roaming on Vodacom.<br> <br> I have 3 devices working on CellC and the other 2 does connect.<br> <br> I have done the following<br> <br> Tried the SIM card in other devices, still the same problem.<br> Tried other cards in that device, they work.<br> It is NOT a signal problem because all 4 other CellC numbers in the house works.<br> It is NOT data settings. I have received the setting numerous times and it works while on CellC signal.<br> <br> There is a problem connected to that number somewhere on CellC's side.<br> <br> I have phoned customer care time and again but they don't want to help. They treat customers like idiots and I am fed up with that. I have done everything that a customer can do from this side. I am a techy person and did all of the things they keep on telling me to do before the first time I phoned customer care. I know that we should not roam on Vodacom when it is not necessary, but I need to know that it works when I need to. CellC has a very unstable network and now I don't even have that backup.<br> <br> I need someone to go into detail on that number and find and fix the problem.