If you don't like a design in your contest, you can decline the design to remove it so the designer knows that it isn't on track to what you are looking for.
To decline a design from your contest, simply click the ‘Decline’ icon below the design.
Made a mistake? You can bring a declined design back. Just find the design you wish to restore by changing your view settings to ‘Declined’ designs.
Then simply click the ‘Restore‘ button below the design and voilà, the design is back in your contest.