HELP! my cell phone is messed up from water!!?

okay well i wanted to go take a swim at my local pool so i did with my friend. well turns out i had my cell phone in my pocket, and without knowing i jumped in the pool. i only swam for 15 mins until knowing it was in there. well i let it dry out in the sun, took the battery and everything. most of the water was out of it but it was foggy inside the phone, well my friend had it for a couple of days and let it dry at his house. than i get my phone back it turns on and works, but the problem is that it says it isnt charged when i fully charged it and the buttons dont work sometimes and my phone like malfunctions. is this normal? what do i do? its the scp 2700 from sprint