Need help with W760i (hardware problem not software)

[kuka007]

Hello, recently i dug up my sisters W760i its a pretty good phone so i thought i should fix it.
The main problem of the phone is that the usb/charger jack is fkd up so it doesnt work and you can even take it out of the phone, ok so i live with that, but because of the jack (maybe other issue i dont know) the phone thinks it is connected to hands-free and i cannot listen to music, call anyone (i can hear what they tell but on speaker and cannot talk because hands-free has a built in microphone.) Any ideas to fix the hands-free issue? I really need the phone.