Red screen after screen replacement

I cracked my iphone 5s, and I went to this guy to fix the phone, and when he fixed the screen, it looked fine. But then i realized my touch id wasn't working, and neither was my front facing camera. He said to just bring it to apple, but I thought it might be a settings problem, so I reset to factory settings. but when the iphone restarted, the apple logo remained on the screen for a long time, and then a red screen kept showing up. i let the battery drain and i tried to connect it to itunes, but it isn't able to update or restore the iphone because the red screen appears whenever it turns on. i've heard about Apple replacing people's phones even when they are bricked or broken, but will Apple replace my phone when they find out the screen has been replaced somewhere else? what can i do?