iPod iTunes does not respond after I've plugged my iPod in...

Okay, so I went running a while ago and accidentally dropped my iPod. It worked for a day afterward, then stopped working at all. I reset it to factory settings, and finally it worked for a little bit, but then all the music got erased from it. Now all the applications work and everything, but whenever I plug in my iPod to charge it, iTunes doesn't respond and if I try to eject it through my Finder, it says "the operation could not be completed. An unexpected error occurred (error code -36). I just want to be able to put my music back on. If anyone could help, I would really appreciate it