Cannot connect to iTunes Store now for 3days, was charged 2xs for an app I did not purchase.

iTunes acting up? I was charged for Jurassic park app twice that I didn't order and strangely a password must be entered to order from store from my iPad2. Every time now for 3 days goin on four that I hit error with this order link it goes to a new page that's blank, tries to load for a min. Or two and then says cannot load iTunes Store? I'm wondering now how much has been taken from-my travel card prepay account associated with this.... So Question...how do u access iTunes Store when this happens? Also when purchased link for problems won't access what to do? Hey I luv dinosaurs with my kiddo but I didn't plan to buy it without trying it for a few first. I got free app, and the next day charged 13 bucks... Wut the heck? HELP