Ericsson Business Development Manager interview questions

The interview was a 2 week process. I was required to conduct research and make a presentation. There were two interview sessions before and after the presentation. An offer was made and I accepted.

I accepted Ericsson' vacancy in LinkedIn on position "Business development manager". I've received the message that my candidature will be considered. After 2 days i received another message " We are regret but you not approached for us" I was totally disappointed and don't know what this happend. I've a lot of experience and a lot of certifications. PMP including. Assumtions: I was overqualified for this position. My target was find job in big projects not matched their assumptions about good business development manager.