Congrats.. I found out Friday that I won.. And the shop emailed me the same day.. I think if I was you I would email them. I cant wait for anything. If it was me I would send an email basically stating you were notified by the Fabshop Hop and you were wondering what you need to do to claim your prize. I do not think it would be rude. I think the shop should have already notified you. If Fabshop notified you.. I am sure they notified the shop.
Please keep us posted on what you won.