MLB at bat app won't recognize that I purchased premium subscription, says can't find purchase in my iTunes Store.

About 5 days ago, I purchased the $2.99 monthly subscription to Premium within the MLB at bat app on my Iphone 6. Although I have received a purchase confirmation as well as the charge showing up on my records, the app will not recognize that I have upgraded. It defaults to the Lite version and when I go to restore it, it states that no iTunes purchases for Premium could be found. This is incorrect, as when I go under subscription in my iTunes account, it states that I have the Premium subscription until April 3. Then, if I try to repurchase the subscription through the app, it states that I already have it purchased as well, but freezes up when I try to go to premium. If anyone has a solution, I would very much appreciate it. This is frustrating and I'm missing out on games everyday. -_-