My iphone 5s screen doesn't work?

I had this phone for a good few months and today just randomly I restarted my phone and my left part of the screen won't work? Like the censor is dead or something and I see these colorful lines. It's very annoying I can't even use my phone. How do I fix this please help?

Obviously take that to an apple store, they will surely fix it.

You don't have to take it to the apple store if the store of your phone provider offers tech support they will be able to fix it and it will probably be cheaper.