My iPhone 5c never tells the right time?

I have an iPhone 5c and it never tells the correct time. When I go to correct it and turn my screen off and then turn it back on, it goes back to the time too when I said it never changes. I've tried resetting my entire phone, turning on or off location services, but nothing seems to fix the problem. I also have trouble with iMessage and FaceTime which seems to shut off by themselves. Any help?

Dunno

You get what you pay for