My left ear recieves no sound and my controller turns off

So at first my audio cord got stuck in my headset and could not be taken out. So, I decided to disassemble my left ear set and unscrewed everything. I could not get my cord out and it is stuck in there. I reassembled it and now i have no sound over my left ear. Recently I could not plug it into the controller without it shutting my controller down 15 seconds later. What should I do? I can't really afford a good headset right now and this is the only one i have.