McKesson Computer Support Specialist - Nights interview questions

I was called and performed a phone interview and was asked to come in for two more interviews. The following week, I had a 1:1 with the HR rep, and a panel interview with my potential department supervisors. They seemed interested, and I expressed interest in the position as well. After being given a complete tour of the facility and given an explanation of what my job duties would consist of, I was told to expect a call by the end of the week, and if I don't receive one, I can follow up. I never got a call, so I called on Friday to follow up. Nobody answered, so I left a voicemail politely stating I was following up with my interview. A week went by with no call, then the following Friday I received an email from the HR rep saying they would not be making an offer. I found this unprofessional, and would have appreciated a more prompt response or at least a reply to my phone call.