I found out at the beginning of March 2021 that booking.com has 'blackbanned ' me over a booking that was cancelled in 2019: a booking I never cancelled, but was cancelled by them randomly without explanation. I showed up at a hotel in Lima, Peru, only to be told my booking was cancelled. Luckily I got in anyway, but have never received any communication from booking.com that it even happened or why. I have no idea why any of this happened and when I asked for the issue to be escalated the support person refused and hung up on me when I complained. Eventually I managed to find a way to complain by email. They asked for the details of the booking that was cancelled, which I supplied. Follow up emails later in March and then 2 months later got replies that said they were working on it and to 'be patient'! Apparently 2 months isn't patient enough. Now at the end of July I tried to follow up on the last reply I received in May, and got asked to supply the details all over again as if it was a new case. When I replied that I had already done so, and it was already an open case, they replied with the exact same request for booking details. I give up! I will never use booking.com again, even if they they remove the random and unexplained blackban. I would suggest to anyone other to avoid booking.com, in case you arrive in some far-off place expecting accommodation you booked, only to find it has been cancelled without your knowledge!! Absolutely appalling company!