No reception on my cellphone.

<p>Suddenly this morning I don't have any signal on my cellphone. I cannot make calls, send messages due to no signal on my phone.</p> <p> </p> <p> I have talked to 4 people at help desk with no response.</p> <p> </p> <p>I have been with Vodacom for 17 years and never had problems but since I upgraded in March the problems just escalated.</p> <p> </p> <p>Ref no: 1- ********** ********** </p> <p> </p> <p>Please fixed this today URGENT!!!!!!!</p> <p> </p>