I used bookng.com for hotel resevation in NYC and inadvertingly booked the hotel twice since the first email about hotel confirmation was not received and asked for repayment (credit card). I submitted payment again and finally received the email confirmation. I contacted bookng.com to cancel out 2nd reservation and they were unable to do so. booking.com said to contact the hotel directly which I did, and they informed me to deal with booking. Com. After several attempts i got absolutely nowhere with booking.com. And the 2nd hotel confirmation is now posted to the credit card. Going forward, I will be avoiding making all future hotel & travel reservations through the booking.com website, due to horrendous customer service.