For you there is no way to travel somewhere without booking an accommodation long time before leaving. Sometimes you have chosen bad hotels, bad sometimes it was pretty good. This time is seems that it's the worst choice you could ever make. Not just that you got a small room, which is dirty and got a bad smell, but it seems that the lock is also broken. Obviously the phone is not working and there is no one around to help you. So use your own abilities and escape from this horrible room. Good luck!
Walkthrough for Accommodation Room Escape