HCLTech Control M Administrator interview questions

Initially the interview set up was smooth. Within 2 days right after call, I had my interview. The interviewer was good and asked basic questions. Few answered and few did not. He asked more about the current profile and work. Later on, on a good note the interview finished. But after that I do not have any update from HR or email. When I try calling them back they neither attend or reject the call. I know I was not selected but atleast have courtesy to inform the same.