When your Subscribers experience technical difficulties downloading your issues, please send the following information to Support along with your query.
+ Copied and pasted device Token of their iOS Device (If the subscription was purchased on another device then they need to be logged in with the same Apple ID on the new device.)
+ Screenshot of their transaction details (http://support.apple.com/kb/HT2727)
+ Screenshot of the home screen of the app
+ Screenshot of their subscription settings on their iPad
(Settings app -> iTunes & App Store -> Tap on account -> View Apple ID -> Subscriptions Manage -> tap on Magazine Name subscription -> take a screenshot)