I've had several cases of drivers just not picking me up. Reading their time to move anywhere at all, driving away and keep getting further and further away, it driving towards me only to turn some other direction. I always just cancel on them and have never had to pay a cancellation fee. I think once or twice they "picked me up" a block away. I'm pretty sure I was able to cancel or end the ride on that too, definitely was never charged though I don't recall if I had to use the support. But I never let it actually complete the trip when I wasn't riding. But I was always very miffed when anything like that happened as I did not appreciate them wasting my time.