Maxcess International Field Service Manager interview questions

I was contacted by HR to arrange an interview. I arrived for the interview and spoke with the department head the interview lasted for over an hour that included and interview with another Field Service expert who briefly tested my technical ability which went well. I met again briefly with the department head. I was also to meet with the HR person who was not available for the interview process. No retun call or email even after I called. VERY UNPROFESSIONAL.