CGI Business Analyst interview questions

I had the worst experience with CGI. I applied for a position, one month after I received an email from HR department willing to schedule a phone interview. The inverview was scheduled twice, but it never happened. I never got the phone call on the scheduled times, and my calls or emails were not responded. I have no idea about what happened, but I believe as a candidate I deserved a feedback about this, which never came. Really disrespectful.