It sounds like you shorted the electronics with the water.

Unfortunately once electronics get wet it can take MONTHS for the liquid to dry out from under the transistors.

The proper proceedure is to immediately shut off the electronics and remove any and all packs ASAP!

Then either let it dry for a month or so, or use a special electronic "bath" that displaces the water with a fast drying liquid.
Even with the latter you need to let the electronics sit for a few days, blow them out with compressed air, and HOPE that everything works.

You'll have to replace the electronics on your plane. That from other manufacturers can be substituted.

I'd recommend that you get help from an experienced flyer and/or join a club. This will not only help get your plane repaired, but help you to avoid a similiar fate in the future.