VistaPrint Deceptive and illegal business practices. Poor CS. Internet

I used to spend quite a bit with VistaPrint...never again. They sent me a postcard for my Birthday...oh how nice I thought. It offered up to 50% off site wide and free shipping. I took the opportunity to order some new business checks. I didn't get anywhere near 50% off but of course they had said "up to" so this was merely disappointing. But I also was charged shipping. I called to inform cs and the gal said she would offer me a refund on my shipping "as a courtesy". I didn't feel like arguing so I accepted the deserved refund regardless of what they wanted to call it. She said something about her computer being slow and said to call back in 30 minutes. When I did the new gal acting as if she knew nothing about the previous call and insisted that although my post card made absolutely no mention of any limitations with regards to the free shipping offer, that the policy was actually that I had to spend $50. Well any person with any knowledge of the law whatsoever would know that this is an illegal business practice. I asked to speak to a supervisor. She wanted to win the argument...and of course she did. The original gal should have her job. Saved $9! Congrats. Lost this customer for life and I'll tell everyone I know. AVOID VISTAPRINT AT ALL COSTS!! SCAM MARKETING AND SURRLY CS> FAIL!