Nothing.
I did not receive the minivan that I reserved through KAYAK's website, nor did I receive ANY minivan from Hertz. I sent an email to KAYAK and heard back from "Shannon" from customer service, saying that any and all mistakes were made by HERTZ. My message was, in part, the following: "I rented a minivan from Hertz (Confirmation # G8204778611) yesterday (Tuesday, January 19th) for pick-up at a Hertz location in Arlington, Virginia (1401 Lee Highway, Arlington VA) on Thursday (Jan. 21st at 10am). I was to drop off that minivan on Saturday (Jan. 23, 2016 at 9am) in Lincoln, Nebraska. The rental cost was $382.67. I also purchased rental insurance, amounting to another $27.00. This afternoon (approximately 4pm, Wednesday January 20th), the 1401 Lee Highway Hertz location called, telling me that they DO NOT HAVE a minivan for me. I have been transferred from office to office, and no one can help. I need a minivan tomorrow (Thursday) at 10am, otherwise I will be stuck in DC for at least three additional days as a major snowstorm approaches. So, why would KAYAK.COM advertise a minivan rental from a Hertz location which did not have a single minivan on hand? Hertz (both that local business, as well as the Customer Service center) cannot help me with a thing...." If I cannot rely upon listings on Kayak.com, then I will need to re-direct my personal business to a responsible booking website, as well as inform my employer, my clients, my family, my friends, my fellow professional colleagues, professional affiliations, and any other person/institution in which I am affiliated, etc., that Kayak should be avoided. I expect more than just an email from a customer service representative, trying to pass the buck off to Hertz and not even providing me with a phone number to speak to someone at Kayak about my situation. I was almost stranded in Washington, DC, without a place to sleep and without any means to leave prior to the snowstorm. Kayak's response showed only indifference.