Can not sign into App Store

I have updated billing info, I have gone through every single authorization. But the app store still stuck in log in loop! I try and sign in and get the message "This Apple ID has not yet been used in the iTunes Store. Gives the options cancle or review. click review and it pops up "Sign In" with option "Use Existing Apple ID" or "Cancel" I AGAIN put in my apple ID and password and it goes right back to the flipping "This Apple ID has not yet been used in the iTunes Store" I am unable to update anything on this ipad due to this issue!