This is a Google guide site, you need to contact them directly. When I have used them in the past (Monday Aug 12) it took me less than 5 minutes to get a car.
When I uses them recently, I was in and out in less than 5 mins with no waiting.
Unless you are having issues renting a car directly, I would contact them. Is nobody there to help you? Are they out of vehicles? Are you waiting to receive a vehicle? Miscommunication? It's hard to say from here but it should be a fairly easy and simple process.
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