Plexus IT Engineer interview questions

Got called for initial interview with HR and they had no idea of the expectations. Second interview with IT Manager went good so I got called in for a 3rd interview with someone from Finance.Even though we agreed on a specific hour for the interview(via phone) when I got there they claimed that the interview was 1 hour before and the manager was no longer available.I asked them to check again and the manager made some time to have a discussion where she wasn't at all interested in talking to me,just to get the meeting over. I have never heard from them again after that point.