I have just listed two rooms with bookings.com and am having so much trouble with them. I already removed a room a few years ago for similar reasons. They double booked a room to have people checking in while there was still a guest in the room. I called them three times to get exactly the same response. They would ask me my details and my issue and then say they would call me back for security reasons but I never received a call back. I had to ask the guest to cancel because he couldn't change the booking so I lost a good guest.