Enterprise Mobility Management Trainee interview questions

First round: HR screening, Second round: 30-45 mins with a branch manager, Third round: 1 hour with area manager. The process was quite long, everyone asked me the same questions, and repeated the same information. After the third interview, it was implied that a branch manager would reach out to me after I did an on site job shadow. It was implied that the job shadow was a formality. On a Saturday, three weeks after my site visit, I get a generic rejection email. I emailed twice for feedback and no response. Awful way to treat a candidate