5.6 Apps cannot use Push Notifications to send advertising, promotions, or direct marketing of any kind
http://i.imgur.com/bsqdYwK.jpg
Where can I report these egregious violations?
BestBuy Push Notification Promotional Spam
First, make sure you leave a one star review.
Next I would try reportaproblem.apple.com - I think that's where you eventually wind up when trying to report an issue with iTunes Store purchases.