Unwillingness to help

I have been a loyal Cell C customer since they day they started operating in South Africa. Recently I UPGRADED from pay as you go to contract, since that time I have been plauged by connection problems, no signal and now I get told that the payment date agreed apon is not a valid date, which means that I now have to pay R380 a month for a contract with a provider that works when they feel like it. I would just like to say that due to the lack of help and unwillingness to help A PAYING, LOYAL customer that I am now going to support the competition. Maybe I will actually have a cellular provider that actually has signal outside of the CBD's