union workers credit service the company sent me a pre approved letter for credit 10,000 at a apr rate 5% and told me to send 37 dollars inon april7 2013. dallas, Texas

I am writing in concern about a company called union workers credit service I receive a letter in themail I was pre approved for a credit line of 10,000 Apr rate at 5% all I had to do is send 37 in an I will receive my card. I sent the money order in on April 7 2013 and I have not received my card it use the brand name of visa or MasterCard I would like to file a report and receive my money back this should not be allowed to happen if they are using people like that it should be consequences.