1) I was contacted by an HR 2) Then, the first interview was set up with the manager of the team 3) After that, interview with team members 4) Received no response even after multiple follow-ups

Process goes like this: informal phone screen --> formal interview with hiring manager --> given assignment to complete and asked to create powerpoint presentation summarizing results --> no show for meeting to present analysis --> no follow up after requesting I keep the next day open I received a phone call from the recruiter an hour after the meeting was scheduled and given the excuse that something came up, but to not take a single minute to send an email to communicate the need to reschedule is extremely unprofessional and a giant red flag for this company. I have yet to receive a response after multiple follow ups. Almost feels like I was used for free labor.