I wish I have read reviews on this site before booing with kayak.com. The service was horrible. I experienced the same problems as other people here.
I booked a couple of international flights and received promptly confirmation. However, the next day, I receive a couple of emails sent at the exact same time, one saying my payment didn't go through and I need to contact them, the other saying my bookings were canceled because they couldn't contact me to verify the payment info. What a surprise! I never receive any phone call from them and the email informing about the payment problem and the email canceling my bookings were sent at the same time, what is the time for me to call back?
I called their phone number and had to wait 15 mins to talk with an Indian guy that i could barely understand his accent. After giving my trip ID, he put me on hold for 15 mins and the line was cut off. I called again, talked with another Indian and was transferred to Payment dept and again the line was cut off. I called back the third time and asked not to transfer me but the guys I talked with ignored my request and hang up the phone. I couldn't believe that kind of customer service exists in the hospitality or any industry. Shame on you kayak.com. I never do business with you again.