iOS 8 ruined my game experience....

When IOS first came out my game stopped working completely. Since the most recent update I now cannot even play the prologue as "this app is no longer shared with you" error keeps showing up even though the game was origianlly downloaded on the device Im trying to use it on and I bought all the ingame purchases from this device. X_X

RedGeryon about FINAL FANTASY DIMENSIONS, v1.1.2