I finally beat this level. Even though you have premium they must be served the correct food items in order for you to get more coins and at least 1 star. The monster wants strawberry cheesecake, the little girl pear croustade, mimes almonds, cowboy pears, ballerina, mille feuille, the nun looking girl blueberries, and I'm not sure what the texters want but I gave them either pears or strawberries. Hope this helps