Horrible CellC Network signal

CellC signal is appalling, the worst I have ever come across. I have an 2014 Samsung S4mini with no problems but can't maintain a phone call for more than 2 min.<br> My calls either takes 30 seconds to connect (if they ever connect) and throughout conversations my voice or the other's voice is bad quality. I need to move around to keep signal, not even being able to sit in my office and take a phone call. I live in Northcliff Jhb and can't even call from my bedroom. I travel alot & have a Bluetooth handsfree carkit, but it is no use as I can't keep signal for 10 seconds on the Highway. <br> Since CellC has grown in size, my service has just been depleting. I have gone to Cradlestone Mall branch and was told to change the service provider to Vodacom (thus Roaming), this is useless to me as I travel abroad and can't use the phone's automatic switch function for international roaming and stop data roaming.<br> CellC provides a contract buy-out option, but I wish it was applicable to their own network. I have been forced by my company to switch service providers due to the horrible phone-calls and the ever increasing phone bills as I need to call everyone back three times to finish a conversation.