My Amazon Interview Horror Story
I had similar experience with Uber last month. My recruiter scheduled an introductory phone call with me and then she forgot about it. The call was rescheduled and then she forgot again. On the third time she did call me but never apologized or anything. Then she scheduled a technical phone screen for me a few days later. On that day my interviewer called me two hours earlier than the scheduled time - no time zone difference, just that recruiter communicated wrong time to him. As it happened, I was in the middle of my lunch and caught off guard. The interviewer wasn't happy, so I guessed I didn't pass that phone screen, but the recruiter didn't even bother telling that to me - she just ignored my emails and she never even gave me her phone number. 
P.S. I was invited to 6 onsite interviews in other companies and in the end I've got all 6 very good offers. So, good riddance, Uber.