I booked a holiday in Mexico, but the booking process kept crashing and when I finally received an E mail the booking was for one adult only! - I called immediately to advise of the error and despite their " Free Cancellation" on the website ( took pictures from my internet history) was told the whole amount was due to cancel but I could cancel one month later for half the cost (?). After a heated discussion they agreed to E mail the hotel to ask them to cancel for free. Five weeks later and 4 e mails I am still no nearer to the cancellation and every effort to contact them has been met with silence. The booking still appears on my account and in fact the hotel "vine" has been E mailing me desperately with advertising. I have cancelled my credit card just in case. I would advise against booking with Boooking.com and use another site such as Travel Republic, where they DO respond to customer service requests and are actually very helpful