Bad service and no signal

I am so disappointed with your service. For the past months I have not been receiving signal most of the time. I can not make or receive calls, can not even use the internet. To make things worse I buy the timed data then all of the sudden I can't use it then it expires. My money is going down the drain. I need a refund, this can't keep on happening. I am so angry I have a big project that i have to finish but sadly i can't use my phone. Your network is not reliable. Can you please give me a refund for the money i have lost because of your unstable network.