There is no option called ( none ) on my payment method and i don't have any available credit-card now !

Howdy there Asaryeh,

It sounds like you want to select None as an option in your iTunes Billing info. This article explains why that is not available, and the criteria for being able to select it:

Why can’t I select None when I edit my payment information?

http://support.apple.com/kb/TS5366?viewlocale=en_US

If you want to select None and remove the payment information or credit card from your account, follow these steps.

Using an existing iTunes Store or App Store account

If you have an unpaid balance or payment due, you can't select None as your payment type. To see which order you need to pay for, view your purchase history. When you sign in to the store, you may see a message that there was a billing issue with your last order. Click the Billing Info button to see the order.

After you pay for the order, you can change your payment information to None.

Creating a new iTunes Store or App Store account

When you create a new store account or sign in with an existing Apple ID (that you haven't used in the store), you must provide a payment method. If you want to remove the payment method after you create the account, you can change your payment information to None.

If you want to create an account with a new Apple ID, follow these steps to create an account without a credit card.

Changing the country or region for an iTunes Store account

When you change the country or region of an existing Apple ID, you must provide a payment method. If you want to remove the payment method after you change the country or region, you can change your payment informationto None.

Thank you for using Apple Support Communities.

All the best,

Sterling