Won Sweepstakes

After learning I had "won" the Mega Millions prize of $1.5 million from David Clark from 914-206-2945 I was told that a package would be sent to me by FedEx.  Later he called back to say they had a problem and it would be coming by U.S. Mail.  I did get it and I see it cost them 68 cents to mail it.  The return address on the envelope was: Mr. David Clark, 328 East 21st Street, Paterson, NJ 07513.
I was out most of yesterday but my phone shows he tried to call me 7 times all throughout the day.  When I did get to tell him his package had arrived, he said, after I review it, I need to call him right away to be sure to not loose my prize.  The package consists of 8 pages with several showing the Mega Millions logo.  The document says I won $5.5 million.  In addition, as an added bonus, I also won a Mercedes car.  The instructions contain a lot of "mumbo-jumbo" on how I'll get my prize but one thing is clear: "after brokerage fees have been received by Mega Million Sweepstakes Payout & Processing Services Inc."  It is these fees that David want to tell me about over the phone.  I'll try to call him now.  He was out so I left a message that I was very glad to be a winner and I'm looking forward to his callback.