My IPhone 4s screen is crazy

So, a few months back I went to get my phone repaired at some repair shop around my area for water damage and cracked screen (4th time I cracked it).It was working completely fine after that until one day it ran out of charge, so as I normally would I went to plug it in, then all of a sudden it turned on, but it wasn't like normal. The screen was fading from blue, to green, to white. Almost like a old TV with no signal. The phone was still on, you could hear people calling and texting me etc, but all you could see was fading colors! I took screen shots of what was going on behind of what I could see so if it turned back on I knew what was happening (which it did turn back on) and I looked at the screenshots and it was landscape! Like a IPad! This is the 3rd time it's happened and now it just won't turn on properly. I have tried updating it, restoring it. Pretty much everything. It's completely bizzare! Any tips!

Mabe its not good