Capgemini Consultant SAP interview questions

I have seen the call for interview posted by the company and sent the relevant details. They called me for the F2F interview. I need to wait for 3.5 hours because the panel members did not come for the interview. Then it was 30 mins technical interview. After a hour a person just walks in the room and tells that I can leave for the day. No sense of professionalism or decency. I did the interview very well so not sure what went wrong. Later through informal communication I came to know they want candidates to join within 2 weeks and my Notice period is 90 days. They could have mentioned this before without wasting my time.