I booked a car rental online through Hotwire. Total price prepaid $75 for 5 days in Cancun, with insurance. Vendor Europcar. When I got there Europcar said that insurance company DOES NOT provide service in Mexico and I had to buy another onsite and for over 200 dollars. It has been impossible to get in touch with Hotwire. I haven't been able to reach their numbers and they don't provide email.