How I can repair or change the audio port?

Hello,

Probably my problem is very rare, but I will ask.

So I have bought a second hand Samsung Galaxy S5 Active. Everything is working fine, except the audio port.

It shows always that earphones are connected, no matter that actually there aren't any earphones connected. Probably the phone was under water.

What I have tried:

1. to clean the audio port wih isopropyl alcohol. The the problem remains.

2. to bend very little the metal contacts in the audio port, so they won't make a contact anymore. The problem remains.

Because of my fails for repair, I want to ask if somebody have already disassembled the audio port, so I can see how exactly it works.

Or if someone knows, where I can find a replacement part.

Thank you in advance.

Kind regards.