Can’t download apps because it says I’m using the U.S. store

How to Change From the U.S. to U.K. iTunes Store

1. Open iTunes and select "Sign In" from the "Store" menu. Type your Apple ID and password, then click "Sign In."
2. Select "View My Account" from the "Store" menu. Type your password again if prompted, then click "View Account." Click the "Change Country or Region" button in the first section of the "Account Information" window.
3. Select "United Kingdom" from the "Select a Country or Region" drop-down list and click "Change Country or Region." Click "Continue" to view the terms and conditions. Click "I Have Read and Agree to These Terms and Conditions" if you agree, and click "Continue."
4. Enter modified payment information, including your payment method and address, on the "Review Payment Information." To use the U.K. iTunes Store for purchases, you must provide a U.K. address and payment method. Click "Done" after you enter the requested information. You then have access to the U.K. iTunes Store.

You can also scroll all the way to the bottom of the page. Click on the flag icon on the bottom right. Select the desired country from the list. This will take you to the country store you want.