I understand completely and I wouldn't be happy at all. You might have been a bit hasty in getting tickets before they responded in saying they can show the boat. I went through a few brokers when I bought my boat. I got sick of all the lies they told.
Towards the end I knew I was probably going to buy the boat I did get. The broker wouldn't show it to me again for some reason so I found a new broker. About a month after I did the original broker called me up to see if I was still looking. I told them I bought the one he couldn't show me again so thanks for giving his commission to another broker.
I ended up liking the last broker a bit better. He lied less... I'm not sure if a used car salesman is a step up or down from a boat broker.