In app purchase problem for iPad
I redeemed an itunes gift card on my iPad and wanted to make an in app purchase on a game that I have made many purchases before on. However, once I click on confirm purchase, it doesn't allow me and tells me not able to make purchase and to refer to apple itunes support. I have looked for troubleshooting ideas and have tried all including to make sure there we're no restrictions, and nothing works. What else is there to do? Help!
iPad 2