Definitive Healthcare Devops Manager - Infrastructure interview questions

They had me lined up for multiple hours of interviews in one day. So, I had to take a half day of vacation since it was such huge chunk of my time. Logged onto the first zoom meeting and no one shows up. Then after about 15 minutes of waiting, I email the recruiter and she says the position has been filled. Apparently everyone on their end knew, but didn't bother telling me. To recap, they scheduled me for a half day of interviews, then when I took time off work and showed up for the interview virtually, they no showed me and had already filled the job. Super unprofessional and Busch league.