Just don't use this service
Zero. Absolutely unusable. I had questions about the time and pick-up for my ride that were virtually impossible to manage by email. Simply being able to talk would have made it easier, but BBC cancelled my messages because I mentioned a phone number. I finally managed to book the ride. Three days before I was due to go, the person in question suddenly cancelled the ride, meaning I had to make alternative arrangements that were far more expensive because I hadn't booked earlier. This is a Mickey Mouse operation. On the basis of my experience, avoid at all cost.
Reply from BlaBlaCar