I came in on time, they told me to reschedule due to their bosses being in that day. On the rescheduled day, they told me the position's already been filled. It was already disrespectful to reschedule when I was already there, it was double disrespectful they didn't give me a rejection email or any indication that the job was filled already!

The interviewer was an hour late. The interview ended up being no different from the initial job application, as in, I was asked for my name, phone number, and previous work experience. Quite unprofessional on their part.