Hi Hannahstark,
Welcome to the Support Communities!
The article below may be able to help you with this.
Click on the link to see more details and screenshots.
iOS: Changing the signed-in iTunes Store Apple ID account
http://support.apple.com/kb/HT1311
Sign in to the account for the iTunes Store region you'd like to use. Tap Settings > iTunes & App Stores > Apple ID: > View Apple ID > Country/Region.
Follow the onscreen process to change your region, agree to the terms and conditions for the region if necessary, and then change your billing information.
Cheers,
- Judy