Verikai interview questions

The interview process started out well. Had a general phone interview with the recruiter who was very nice. After, I got an email back that I would have a video interview with the hiring manager and would also have to complete a few 'challenges.' This included a lot of writing and grammar/spelling check exercises. Submitted that and then had interview with hiring manager. Thought it all went well and I'd hear back soon about next steps. Well, I never heard back and had to keep following up until I finally got a response. They wanted to bring me back for another interview. I send my availability and then once again, I don't hear back. I send follow up emails and finally get another response saying all of a sudden the position was filled. Was a very unprofessional process.