Terrible Connectivity

I have made numerous call to the call centre, been through numerous set up processes and still not able to resolve the reception problem I am encountering on a daily basis. I was told that Virgin mobile operates off Vodacom and cell c Towers and that the connectivity would bounce between the two depending on signal strength. This is not true. I was previously on Vodacom prepaid and never had a problem. I was promised on two occasions that a technical adviser would call me and to date, still no call back. I lose complete connectivity and not able to receive calls at all. Signal strength is full but no connectivity. if this cannot be resolved please cancel the contract. Id rather go back to pre paid with a service provider that can offer a service.