MediaMind Client Services Manager interview questions

I was contacted by their Talent Acquisition Manager in Dallas, Texas she was extremely friendly and asked me about my current position and what my daily responsibilities were. She then informed me that she would arrange my in-person interview for the following week. I interviewed with three MediaMind employees , two of them were extremely friendly and easy to talk to one of them was a little more rigid and very difficult to hold a conversation with in my opinion. Long story short after sending out hand-written and e-mail thank you's the company did not even have the decency to let me know that I wasn't in the running for the position.