How do I fix my OT Sport MP3 (earphone socket)???

Hi. The earphone socket of my mp3 has been slightly damaged. What happened was that I was trying new earphones on my mp3, which didn't fit right into the socket. Then I foolishly forced it in, which probably loosened some of the sensors inside. And now when I listen to music the sound is low and distorted. Sometimes you can only hear the music without the voice and sometimes you can't hear anything at all if the earphone's plug is slightly turned. Can anybody here help me? Or do I need to take it to some kinda shop to get it fixed. Thanks in advance!