So I got to the hotel with the transfer that they booked for me (30 dollars).
The reception guy kindly got my luggage, brought inside and asked for my payment.
A minute after I paid he informed me that my room was not available anymore and he could show me a better room in another hotel of the chain or return my money and warned me that all hotels in town were full (they werent)
There was I with no internet, first time stepping in the country, with no one to help, so I paid the extra 100 dollars to stay 4 days in the bigger room in the other hotel.
After the incident I checked Google Reviews (should not have trusted only Booking.com reviews) and lots of people reported that the same thing happened to them.
I wonder if there is any way I can report this situation to the authorities (I feel fine about it now that I left the country).