National Collector's Mint review: Coins and upselling

I received a catalog in the mail today and tried to call their [protected] -MINT number, extension 3175. This is a company which allegedly sells coins and related itms. When called, no one answered the extension. I went to the web page and got another 1-800 number and placed an order and gave them all of my credit card info and then the upsale began. I told the operator on five separate occasions that I just wanted to place my order and I did not want to buy anything else. She was insistent and I asked to speak to a supervisor. I was placed in someone's voice mail and, of course, I have never gotten a return call. This whole set is suspicious and their lack of responsiveness if appalling. I would NOT recommend using this company