First was contacted by a recruiter after applying through college recruiting platform and had a basic phone screen, which was more informational than anything. Had other offer deadlines coming up, and HR was efficient in moving me on to manager phone screen of around 30 minutes which consisted largely of simple behavioral questions and resume overview. Scheduled an on-site a few days later, which I was told would be the final round by HR. Went to the office and had a great interview, after which the manager was very friendly and immediately scheduled me for a phone-screen final round so I could talk to the senior manager. HR had already told me this first on-site was the final round, but I didn't mind, and we scheduled the phone call. I was waiting for the call during the scheduled time, but no one called me. I emailed my interviewer about this and asked to reschedule, minutes after which a recruiter contacted me and said the team had changed the job description in the past two days, and were looking for someone with different skills, so was somehow moving forward the process without me. I was left extremely confused given there is only so much a job description can change with the same job title, and I was asked pretty general behavioral questions so far that tested my knowledge and experiences at large, not specific to any niche position. I doubted that the job description changed so significantly that my interviews had to be completely disregarded. I emailed my interviewer asking for any feedback, since the recruiter said she had no more information on her end. After following up 3 times with no response, I am appalled at their complete lack of professionalism and disregard for candidates' time.