Problems with IPhone 5c screen?

It's been glitchy every since I bought it a month ago, and the screen has these lines going across the lower half of the screen. I have a family member that s happening to them to. I just updated it with the recent update, but it went right back. How can I fix this. I've turned off the phone, and restarted it but the same thing.

Get a new one because there's a problem with the screen, sounds like a defect…