MISLEADING CELL PHONE SALES

When you go to buy a phone on bestbuy.com or wirefly.com or samsclub.com it routes you to a company that uses wireless customer service as there mail to address in VA, the site states you can get the discount phones on service upgrades as well as new plans. When you call they tell you that you can only get the upgrade if you upgrade your main line. The reason for this is b/c they don't get a big commission for upgrading your secondary family lines. I looked all over the web sites for any indication of this and couldn't find anything? When I asked them why it didn't inform me of this before I called and wasted my time they said that they didn't have to and that my provider wasn't offering me a discount on the phone so I could pretty well take it or leave it. I thought it was just bestbuy's online but found out they handle mulitple retail locations and I frankly think they are doing a very pooor job!