What is the problem if there is an error in initiating purchse with iTunes?
Initializing purchse with iTunes is a frequent dialogue box coming out whenever I make purchase of items/characters or gems from the Skylnders Lost Islands game.
iPad, iOS 7
What does the message say ?
If you are getting a message to contact iTunes Support then you can do so via this link and ask them for help (we are fellow users here on these forums) : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then Purchases, Billing & Redemption
If it's a different message ... ?