Not functioning correctly after water damage

i accidently dropped my 3DS in water. the power was on while underwater. i immediatly took it out of the water and then it automatically turned off. when i dried it off and turned it back on the top screen was completly black. after about 2 hours i turned it back on and the top screen was back on but there are now many other problems such as: circle pad moving by itself forcing all movements to go to the left

notifications light is staying lit green

A and X button not always responding.

does anyone know what i should do?? PLEASSEE HEELLP!!!!