The LAST time I take out a Cell C contract!

There is a reason why Cell C is cheaper than the other networks and it is because there network is pathetic! For no reason my incoming calls just stopped working and I don't know how long this has happened. I use my phone for business so I have no idea how many people tried to get hold of me but couldn't. When I called the call centre, they couldn't fix the problem. I must now try and put my sim card in a different phone. Where must I get another phone I only have one phone! This is the last time I use Cell C I will rather spend that extra bit of money and go for the bigger networks!