While it sucks AirBnB didn’t do anything to help you, I think anyone who goes to a foreign language, third-world country has a responsibility to research relevant laws and have some kind of backup plan when something like this happens.
Tip for the future: buy a good guidebook (or several). They have listings of hotels with price estimates, whether BnB is a good idea or not, and what the legal requirements are how to handle them when things go wrong.