To search for the rental car you prefer, use the website, you can obtain a quotation there and make a reservation. Enter your search criteria ( dates, times, location) and click on SEARCH.
At the top of STEP2 (above the individual car photos) is a scrolling left to right car type filter, where you can filter the results by car size, for example 7,8 or 9 seaters or convertibles where they are available. At STEP3 you are able to add extras like baby seats, GPS, additional driver. A credit card is required.
If no car photos are displayed, then adjust your date/time as not all locations are open weekends or out of normal business hours.
If possible use a laptop, tablet or PC rather than a mobile to conduct your search.