If I understand what happened correctly, you bent the plug on the end of your headphones. If that's the case you can go to RadioShack or your local electronics store to buy a replacement plug.
Here's an example of what they look like.
http://www.radioshack.com/product.as...t%5Fid=274-284
You can also find a much larger assortment at
www.mouser.com
They require a small bit of soldering, but it's fairly easy to do.