USSA Aka NBPI please be careful of this rip off look like a government form but it's not! Las Vegas Nevada

I was sent a letter in the mail informing me that I had won over 3 million dollars from a company called ussa. I figured that the company was legit because the form that they sent to me really did look like a government form. I really believed that I had won something. I realized it was a scam only after I had sent them the money. The BBB has on its site that only 22 complaints have been filed about this company and that of that 22, only 5 were answered and taken care of. This website has 75 complaints filed under the name USSA and 37 complaints under the name NBPI!

My main problem, is how did these people get my address,what other information do these people have on me,and how do I find out whether or not they are doing other things with my information? Just be careful!

Elizabeth
Macon, Georgia
U.S.A.