You might have luck seeking the help of a local cellphone repair shop. Whenever you encounter liquid damage with any electronic, you always want to turn it off, remove the source of power if possible whether it’s a battery or power cord, and take a look at the inside. You may have a short in or around the charge port. If you see a white, crusty substance around components, that’s an indication of liquid damage. You can use 90% or higher Isopropyl alcohol and a tooth brush to clean up corrosion. Considering how long the device was exposed to liquid damage, it may be beyond repair but at least take a shot. If you call any repair shops, ask them what their liquid damage repair/diagnostic costs. Good luck!