Dear Emily, Thank you for choosing 88 Rooms hotel for your staying during visiting Belgrade. We appreciate at your comment and certainly thank you for taking the time to share your experience with us! We are very disappointed to read that you did not have pleasant and well expected staying. This situation which happened in period of your staying (problem with your door lock) was unpleasant for you and also for us, but we did our best to solve this problem. It was a temporary problem which have never happened to us. We did never make room key which can open all room doors and provide it to the guest, but system caused mistake during programing your room key card. We have noticed this problem and removed this error immediately after occurring. We any further request or information, we are at your disposal. Hope to welcome you again in the near future. Sincerely, Hotel 88 Rooms**** Sales & marketing department