2003 Saturn Ion water in the engine

My wife was driving the above vehicle back home from work. It was raining heavy at that time some how she drove her vehicle through the puddle at a speed of 15 mph. And car stall at the same time. Next day I took my car the dealership and they told me that there is water in the engine there is nothing can be done to fix the problem. I have been told that I need a new engine.
I need your advice to let me know that is there any way we can get the water out of the engine and can make my car running without any new engine.

Thanking you,
Nilesh