When Vendors don't answer calls, emails, voicemails?

I bought a 4 door Dakota for my wife, and it had a bad 4.7 motor (surprise, surprise!) and decided to get a reman motor for it. I checked around, and narrowed my choice down to 2 companies that sold remanned engines. In the spirit of not bashing anyone by name, I called the one closest to me here in the Carolinas, and asked questions about their process of rebuilding, and any upgrades that they may make to the problematic 4.7 Dodge. The facility manager acted like he didn't have time to talk to me, nor did he care whether I bought their motor or not. I thanked him for his time, and threw their number away. I called Powertrain Engines, and got the exact opposite treatment. The sales lady answered a bunch of questions, and asked if I would like to talk to the president of the company? I said sure! He talked to me like he had known me forever, and explained everything they did to the 4.7 in great detail. I bought their engine, and couldn't be happier. I got a call months later from an unknown number, and figured it was a telemarketer. Nope, it was that same president of Powertrain asking if my new engine was performing up to expectations, and if they needed to do anything different to improve the purchase process! If I ever need another oddball engine for a daily driver, that is where I will go. If I need a crate type engine? Phhht!.....it will be Johnny Mac all the way! :D