I received a Free Gas certificate from the Buick Dealer. I have been mailing in $100 gas receipts from the same gas station since Oct 2008. They acknowledge receit via email, but I have not received the $25 gas cards each month. When I mailed the Feb 2009 gas receipts, thr letter came back, return to sender, and the 800 -514-0366 has been disconnected. read full review »