I would...
Try to straighten it out using a c-cramp.
Remove bottom cover and inspect whether it's safe to use cramp without damaging any circuit around it. If so u may have to remove stuff before applying cramp.
Use two pieces of aluminum, at least 3/8" thick top and bottom of the case as buffer/cushion, slightly sand the aluminum pieces where it's going to make contact with the case, this removes any dirt and what not, because when u cramp down, whatever is in there is going to be pressed in and implegnate into the case. Aluminum shafting is OK, matches the Air's case but u don't want anything else
With those two aluminum pieces in place, slowly use a c-cramp, am thinking a 4-5" for strength, and tighten slowly until Air's case is straight again. Careful! if aluminum pieces start to slide, back off and repositions pieces before continuing.
Good luck.