CBRE Production Analyst interview questions

The most unprofessional experience I've ever had. They only gave me a phone call using one of the phones from their common meeting room (can't be traced), no email confirmation or anything. When I arrived, no one at the office seemed to know that someone should come out and do the interview, and the girl at front desk couldn't find the interviewer, as he didn't use his personal phone, so I waited for 15 minutes until finally the guy who called me came out. It seemed like he just wanted to wrap up the whole thing, with absolutely no comments on my answers and one or two sentences on the questions I asked him. No doubts that the result will be negative, but I do not want to continue the process anyway.