We made a reservation for a car rental through Kayak with Dollar Rent A Car at Cancun, Mexico. The price Kayak initially provided was COMPLETELY different of the price Dollar tells you when we picked up the car.
We booked a FULL size car through Kayak for 6 days; the size car Dollar gave us was an economy size, which it should cost less. Also, the price provided by Kayak for all 6 days was $390.40 (including taxes & fees) however, Dollar tells you that Kayak doesn't include insurance so they charge you another $337.00, for a total of $727.00. What did Kayak do? ABSOLUTELY NOTHING!
Basically Kayak does nothing for you, not refunds or even taking your claim seriously. They are not going to contact the 3rd party to make sure this won't happen again, just plain simple: Kayak doesn't care. They tell you that you should have read their terms of conditions and because they are not the ones who made the final transaction, they cannot be responsible for what the car rental company does, etc.
We, the customer are completely unprotected by thieves and Kayak let them. They mislead the customer through their website (which is just a search engine!) offering different prices but more importantly they should be responsible because they are selling other companies products and services, remember: THEY ARE MAKING MONEY every time they book travel or rentals for others. STAY AWAY, do not use Kayak, book your services directly with trustworthy companies and do not let Kayak throw you out to the sharks.