CELL C - cant fix my problem

My Cell C problem Cell Number *** ( purchase date 5.5.2014 INV ***IN***).<br> <br> I get a NOT REGISTERED ON NETWORK message, with a little icon left top of my screen, it is a triangle with an exclamation mark in. This will usually happen in buildings or places where there is no signal. <br> When I go to a place where there is signal again the icon (triangle with an exclamation mark) will disappear they signal bar will sow full signal strength.<br> But when I want to make a phone call it say NOT REGISTERED ON NETWORK. I don't get any incoming calls as well.When I restart the phone all the miscalls will come in and the phone will work normally. <br> Sometimes this happen 2 to 3 time a day, sometimes once a week.<br> What I have done to resolve the problem since August 2014 - current.<br> Logged calls at cell C Call center<br> ***<br> *** <br> SD376341g<br> ***<br> <br> I still have the same problem after 230 days - Cell C is not capable to resolve this problem. I got 20 calls already from the call centre - but it does not help - THY CAN NOT FIX MY PROBLEM!!!<br> <br> It just go from one guy to another, just reading off little instructions - but don't resolve anything.