To receive daily notifications, activate Push Notifications when prompted or enable them in Settings under Notifications.
Some free content cannot be downloaded over the cellular network. Connect using Wi-Fi and try again.
To access these gifts, the Region Format setting on your iPhone, iPad or iPod touch needs to match your iTunes Store account.
If you're on iOS 6, be sure to check the storage capacity of your device to ensure you have enough space to download the offers. You can also download all gifts from the iTunes Store on your computer.
If you are still experiencing issues with the iTunes 12 Days app, visit: https://www.apple.com/support/itunes/