National Media Group Government grant funding Internet

I received a little green card in the mail about a government grant that was pending for $20,978 (DOE). I called the 1-800 number to "claim" the grant. A man answered (did not sound foreign) but there was background sounds of a dog barking and a child playing. He asked for the "Release Code" and I gave it to him, phone was cutting in and out. Then he said that the packet would be sent out to me at no charge but that I would have to pay for the shipping cost and that he needed a Visa or Mastercard number. I said I don't have a visa or mastercard and he said he would have to check with his supervisor and the phone went silent, I waited for 3 min and then hung up. I realized it was a scam and called back because I needed the company name so I could report it. According to the BBB this is a scam and it is Not Approved by the  BBB.