Had a short phone call with HR where they couldn't answer any of my questions and asked me very little. I was supposed to have a screening with an engineer right after that call but it got rescheduled during the HR phone screen. The engineer then didn't show up to the new time. It took a week for HR to contact me about interviewing again, and they did not acknowledge the no show, and when asked about it they refused to apologize or give a reason for the no show. I did not continue talking to them after this.