Yeah so sorry to hear. Younger chameleons usually handle falls better than larger chameleons. We had a neighboors cat on our porch one time where we keep our chams, the cat was chasing an anole that hung around outside because of all the crickets. I didnt realize the cat had clawed through the top of two cages while running away until the next day i went out to feed my chams. At that moment I noticed that one of my chams was missing i looked all over for her and after it was confirmed that she was not up on the porch we knew she fell/jumped off! Half hour later i found her basking in a bush happy as can be and that was a 20 foot fall. I know we got really lucky im sureit all depends on how they fall.
I can offer you a free oustelets chameleon If you are interested. I have several to choose from im trying to rescue them here in florida because there is a wild population that fish and wildlife is trying to erraticate. Send me a PM if you are interested. ... My condolences.
Matthew