MetLife Financial Services Representative interview questions

I had an on campus interview with Gateway Capitol Financial's recruiter we met for a short period of time told me about the company, the position, and wanted to see if I was a good fit. I later took an online self assessment test to see if I would be good for the role of an FSR. I later met with an agency director at an office of MetLife where we talked about my background in finance and the questions asked were behavioral and not too difficult. This interview was about an hour long. I then was called back for a third interview with a different Agency Director and traveled to a different MetLife Office and he did most of the talking basically selling me on the position. I later received a contingent offer pending a background check, credit score, criminal history and "other conditions." I passed all the background checks they did on me. I scheduled a 4th interview to what I thought was to finalize the contract and get things rolling. The morning of what was supposed to be my interview just 3 hours prior I received a voicemail from that first recruiter saying that my interview for later that afternoon would have to be cancelled with no reason given and that if I had any comments or questions to call them. I immediately call to find out why my interview was cancelled with no response. I leave a voicemail and never given a return call. This was Friday, Saturday Sunday and Monday all go by without any contact. Tuesday I get an email saying "I am no longer being considered for the position and they found better candidates with more chance of success in the role of an FSR. So I didn't meet those "other conditions" and didn't pass their pre-employment tests. Once I received this email I called the office thinking it was a mistake because I had a 4th interview scheduled and cancelled on for no reason. I got in touch with the recruiter that left me my voicemail and she couldn't give me a straight answer of why they rescinded my contigent offer. VERY UNPROFESSIONAL. Applying was my first mistake.