water damage, changed camera but not work.

Hello...

I dropped my iPhone 6s to sea water.

At the repair shop near the sea, repair guy changed only lightning connector module.

But rear camera and flash light were broken, and the LCD was little flicking.

Few days later, touch screen was broken too.

So, I bought some parts from ebay and repair myself.

When dissemble my phone, I saw burned camera bracket.

So I think changing camera module fix the problem...

But rear camera and flash light still are not working.

Now, what should I do to repair my phone?

1. buy another rear camera.

2. buy a flash light module (is there any for 6s?)

3. change camera IC chip (I don't think I can do this. But is there any camera chip??)

4. change burned bracket. hahaha.....

5. ...?