Accenture Sr Developer interview questions

There were two rounds. First was telephonic and second round was face to face. The questions in both the rounds were more or less the same. After some three days of the face to face round I got a mail from the IDC(Accenture defaullt mail id) that I had cleared both rounds of interview and that there would be HR round. But after that there were no more calls for HR round. I followed up a couple of times but got no response. My question to Accenture recruitment team is that if they don't have openings in the first place then why do they waste people's time and energy. They don't even treat candidates with respect to let them know what the situation is.