Why is my touch screen not working? Or my zoom in?

I assume it’s water damage cause I was sitting on the beach, all of a sudden a wave came in even though I was sitting on a little up hill. I grabbed it within 5 seconds. After a few days and charging battery, it came back to life. However, the touch screen won’t work or zooming out that’s not working. It can still take photos with the top button. Cant power off or anything related to touch screen. Is this camera repairable?