Can I fix my sprint lg fusic

okay about 2 weeks ago I went on a water ride with my phone and I got soaked [I dont have to be told how stupid that was cause I know and theres a whole long story behind why I went on anyway] well when I 1st got off it was going crazy just dialing...

random numbers. then I took the battery out for a little while and when I put it back in it said something about s/w upgrade I dont remember exactly and I couldnt press buttons so I took the battery out and put it back in and didnt turn my phone on and the next morning I turned it on and it said carkit mode. so I took the battery out and put it in and it showed me the upgrade thing then I took out the battery and left it out 4 like 10 mins and it went on and it only goes into car kit when its on charge.
I accidemtly took out the battery before and when I put it back in its sawing s/w upgrade then below it says "cannot answeer calls while in s/w upgrade"
and th e0852 buttons dont work. and I need those ubuttons lmoao they are in my area code and my picture lock code! is there anyway I can fix this. I cant get a phone till my upgrade in july `09 && I know 4 fact my parents wont buy me one before that

go to where you bought the phone
and ask if they can
usually they do not fix water damage.
your better off getting a new phone
if they can fix it..then your in luck
if not, just buy a new phone