VIPKid interview questions

I was very disappointed in my interview process at VIPKID. I have two years ESL teaching experience in Japan and 1 1/2 years teaching early childhood in the US. I got through the first interview where I was told how much I would be making and what steps were next. As I was sent a contract and training, I was under the assumption I was hired. I prepared for my first mock class, watched all the videos, and had props. The things I was asked to work on I felt I addressed appropriately and my main issue during my mock (going a little long) I asked for advice how to fix and worked on a game plan with my interviewer so I could do well on mock 2. During my interview and my mock I was praised for how I taught and my mock lesson teacher was already talking about resources I could use as soon as training was done. The next day I got a letter saying they decided to pass on me without indicating why. I feel like I put a lot of time and work into this process, was lead to believe I had a job, and had one pulled out from under me.