Verifone Applications Support Analyst interview questions

I have passed first two rounds. One telephone round (Primary) and one Face to face round. After second round, i got call from HR and said that i have cleared second round also. When ever i contact consultancy and Verifone, they informed that my interview is not scheduled due to manager availability. After three weeks they informed, my application status is negative now. But how? When? Then why hold application for more than three weeks? That was really frustrating experience.