As you’re not the land’s owner, your best recourse is most likely regarding the trees. MINAE takes a very dim view on removal of any trees whether on your own land or otherwise. Even if you can’t immediately prove the trees were actually on your land file a denuncia ASAP saying they were on your land and start the administrative process. MINAE has more and broader powers than the municipality and usually moves quickly. This is a good example why I have my property lines staked. Also a good example of one of the few advantages of concession property - no squatting allowed!