Priceline complaint: USELESS should be the name of this company

I booked a car rental for my husband and son two weeks ago through Priceline.com. They are at this moment (1:41am Central Standard Time in the US) stuck at the Alamo Car rental counter being told that there are no cars available for them. There’s no way for them to get an Uber or Lyft from the car rental agency, so now they have to make their way back to the airport just to get an UberLyfttaxi to get to the hotel that’s 45 minutes away. How is it that Priceline can take your money, guarantee you a car rental, only for you to show up and not have a car ready and available. I’m out-of-state, 2 hours behind in time zones, trying to contact Priceline, who’s trying to call the car rental agency. This is ridiculous. PLEASE DO NOT USE PRICELINE. I WILL NEVER RECOMMEND NOR USE THIS AGENCY EVER AGAIN, AND I WILL DEFINITELY BE SHARING THIS GODAWFUL EXPERIENCE WITH EVERYBODY, INCLUDING ON MY SOCIAL MEDIA.