Indigrators Customer Support Engineer interview questions

Walk in interview, I was the only one attending that day(should have gotten the hint and left right away). Three rounds of interviews completed with recruiter, lead and client. In all these rounds, none of them mentioned that they were looking for someone with a notice period of 15 days. My notice period was 30 days. So, I just wasted hours of my time that's never coming back on this job. I'm thinking wondering if they are really hiring or if it's just for show. Anyone thinking of giving any interview for this company, don't bother.