For example, if you're buying a car ask the salesperson how many gallons of gas does the fuel tank hold. If they don't know the answer, you now see the kind of salesperson your dealing with. As a customer , do your homework. Knowledge is power. And if you do find that they're lying, it's time to say goodbye.
People buy from people.
Keep trying, never give up. If you get voice mail, just leave one message, but keep trying. I find that people do return more e-mails than voice mail. Set up an appointment over e-mail. One to two percent.