Principle claiming potential customer is lying about poor service

I enquired about a property listed by Remax Helderberg on a website. For five days there was no response. When I told the principle that her agent failed to come back to me, her response was that she found what I was informing her about hard to believe. She added that the property I am enquiring about was sold and that her agent is very busy. There was no apology or anything besides her arrogant dismissal. Guess Remax is too big to care about the man on the street - which happens to be a potential client. I figured Remax does not see either potential nor client.