Mygate Front End Developer interview questions

A consultant got in touch with me and said my gate is looking for Senior frontend developers. A date and time for the interview was scheduled, on the day I waited for 15 min thinking someone may join but no one did. I called the myGate HR about this she didn’t lift the call. Without checking with me they reschedule the interview for another date. (no explanation was given to why the initial interview was cancelled or the interviewer didn't show. So I randomly get a notification on my google calendar that there is an interview scheduled, I joined the call and the guys says "Can we get started after 20 mins?". I was ok and let him know that we can start after 20 mins. Once the interview started the first question was tell me about yourself, no I am so and so I work as so and so at MyGate nothing. Looking at the other interviews this seems to be happening way too often. I don't even finish the interview as I felt the interviewer is not really interested in taking this interview and I didn’t want to respect the time of someone who doesn’t respect mine.