You can be the bigger person and still make a point. Show up, get the car for next week, and then ask when you return it what happened.

May I also recommend never relying upon them again?

That truly sucks by the way. It would have been the polite thing to do to contact you. Especially when you were due to be picked up for 11:00 PM. That's too late to get another travel solution. Sheesh.