Bottom of MacBook Air Bent and Coming Off

I just received a MacBook Air from a seller on eBay. It was said to have "minor cosmetic damage," but it showed up with the entire bottom of it bent and coming off (right near where you insert the power plug). I'm not sure if this is something Apple can easily fix, or if I need to get a refund from the company and try to find a new laptop.

It almost looks like it might be dangerous to use as is - it seems like part of the computer underneath is exposed! Here are some photos to show what I'm dealing with. Anybody else ever had a similar issue? Any insight on what move to make next?