One time I requested a car and it showed up -- I watched someone else walk into the car from across the street. I chased them down but the car did not stop. I was freaking out because it looked like the trip had started, and I was the one paying for it! This is the drivers fault for not checking to make sure it was the right person. It took me a while to get another car for them to figure it out. I kept calling the driver. Such a frustrating experience.
What should I do next time?