They force you to use a card to do this. else you need to do it in a roundabout way
Download any FREE application inside the store on any Apple device without an account.
2. Once the pop up window opens, hit 'CREATE A NEW ACCOUNT.'
3. Make sure you use a fresh, new email that you have not yet attempted to use prior to this explanation (create a new email if you have to.)
4. Fill in the required fields to continue on to the second page. (When my cousin was doing this a few minutes ago, he put a fake birth year, a year that made him under the age of 18, thus perhaps helping towards card problems)
5. Once you are on the page that asks for your payment information, on the top section, grouped in under the credit cards, there will be an option labled 'NONE.' Select it, and fill in your billing information.