Very rude and unprofessional

I contacted Ken Nguyen regarding one of his condo listings. The MLS showed it as ACTIVE and I wanted to set up a viewing. After making a big effort to track him down, Ken told me that they already had an offer that the bank was reviewing and he was not interested in talking to anyone else. While I was trying to clarify status, he yelled at me that he is not interested and hung up. I am amazed that this kind of behavior is being allowed by a company like Caldwell Banker. I thought that they have standards for their employeed.