I have just had a cancellation of a three-night 4star-hotel stay reservation in Barcelona by booking.com at the end of the month. I did the booking over two weeks ago and it was indeed a very good deal. The first day, I got the booking confirmation and the next day the booking cancellation (both messages from the hotel through booking.com). I contacted booking.com several times and I was getting messages assuring me they look into the issue. Last week-end I got a hotel message via booking.com that the CC data were not accepted and I had to give another CC within 24 hours, otherwise the booking would be cancelled, which I did, and I got a confirmation of the booking from booking.com (that is it was still active). Yesterday, I got the message of cancellation from booking.com, attributing this to wrong price listing of the hotel. They did not offer an alternative but just to book in the same hotel for four times the price I booked.
My question is whether there is any regulation for such arbitrary cancellations of booking.com. I wonder whether legally this is an abrogation of a deal I had with booking. I did another booking directly to a hotel. I do not expect any refund or something for booking, but I feel I was fooled and I want to chase the case if possible.