Autodesk Consultant interview questions

I was contacted by one of their internal recruiters in Linkedin for a position they had been advertising for a while. The whole processed lasted more than two months, a total of 5 interviews, 8 different interviewers. After the last interview I was told I would hear back within a week. I never heard back, I sent a couple of emails to the recruiter and to the hiring manager without any response. Extremely unprofessional behaviour, if that is how Autodesk treat their candidates I don´t event want to know how their treat their employees.