How to fix Headphone Jack that damaged from electrocution?

Recently my galaxy s4 headphone jack has been mistaken fried because I plugged in a 3.5 jack that was filled with electricity (thanks to the crappy speaker)

So right now when I plugged in my headphone, the sound from left channel would crackle a lot, and the right channel doesn't even play.

The speaker still works, and I can still play the music just fine from the bluetooth.

I've look up ifixit to replace the jack, and found across a similar person who have the similar problem but unfortunately he can't solve the problem by replacing the headset.

Anyway I can try to fix it? Thanks in advance.