What happened to This iPhone?

Hello everyone, I have and iPhone 6s and it's not working very well after I accidently hit it off the counter into the toilet. Since I am 13 years old, I have to have a phone to communicate with. So, I thought that maybe I could keep using it. Well, I thought wrong. After I took it out of the toilet I checked the camera and flashlight. As I was doing it my screen would constantly start flashing and turning off. Every time it kept turning off, I would do a hard reset of the phone. I put the bad in rice for about 24 hrs. And lo and behold it kept flashing.

Skip ahead three days, I kept using it, and the more I used it it would work fine. Nothing wrong. I was on my way to the airport for a vacation in Arizona and I checked the camera and I all I could see were lines. So I panicked and just thought I could fix it later. All of a sudden the screen was glitching again and the screen turned off again. After the hard reset it did not turn back on.

Skip ahead to two months later, I looked inside and the primary camera module for the back camera was fried. After further investigation there was a little bit of corrosion at the top of the phone where nothing is. I shined my other phones flashlight on it and I could still see the home screen and lock screen. But, the flashlight and the camera do not work at all. I also ordered tools to look underneath some panels for corrosion. And I thought I would have to replace the backlight and the battery. So, can anyone help?