Rude and pushy

Before we event went to view a house they were listing for sale, the agent was pushing for us to see their mortgage broker. I had to repeat several times that I wasn't interested as I already had everything in place, and they still would not listen and threatened to cancel the viewing if I did not make an appointment. I took the decision out of their hands and told them to go ahead. I would be furious if I was the seller that they were treating potential buyers in this fashion.