Too bad for you body. That kind of stuff happens to me all the time.
I'd stay away from heat to attempt a fix. Some kind of instant cement might work but I'd test it fisrt on some tree pieces from the kit. I've used CA type glues already for other things like remote control cars and it can attack certain plastics. It might be pretty hard to make that repair that it is not noticable. It may be best to just buy another kit and start over with the body? At any rate, I hope you get it fixed. Good luck with whatever you decide.