Edvox Music School interview questions

I applied online and had one round of phone interview followed by an in-person interview. The interviewer was late for both interviews: I had to wait for her to call me 30 minutes after our scheduled time, and for the in-person interview, I was left alone in a meeting room for 30 minutes with no instructions. The interviewer and front desk staff were patronising and condescending, often making rude facial expressions and tactless remarks (not only to me, but also to another interviewee). The lack of professionalism is appalling.