Good luck. .. I've been fighting for 20 years re: US copyright violations. w/no compensation. The most gratification I've gotten was "cease and desist". (when they stop using the images)
Because of your location & theirs, I would think that you would have to find either 1) an international copyright atty to *try* to get a judgement in your favor in court ...(collecting on that judgement is a whole other ball of wax) or 2) look up the statutes on international law regarding copyright .. or 3) get real lucky that they would 1)even listen or respond to you personally and/or 2) offer any type of compensation. You will, of course, have to provide proof that you are the author of the work .. (probably to their atty). .. You will also probably need to deal, not with the hotel, but with the corporation that owns the hotel. ... who, most likely has a team of staff attys.
Maybe TinEye has an outline of procedures with links to international copyright laws. (?)
This is exactly why I've started putting obnoxous watermarks across a lot of my photos that show on the net.