Just get them out of your rating a range if that doesnt work just try to ge ahigher rating because then the site will think you are to good for unrateds and not pair you up with them
How to stop getting unrated games?

I think there is also a option in the advanced search settings where you can put a minimum number of played games.

Start a game from here http://www.chess.com/echess/create_game you can set 'Rated' to yes.
I play 3 day correspondanmce chess and when I start a new game I put in the range of players I want to play. I get so many unrated games which I abort . I don't like unrated games nothing won or lost. How do I advoid unrated games?
Thanks