For the last few months I used my credit card to purchase my games, now I got an iTune 50$ card that I just redeemed. It says that I have a 50$ discount on my account but my games still get billed to my credit card?! How do I actually use my 50$ credit (not the card)? I saw that under my account I can choose Visa, Mastercard or none, should I choose none? Thanks.
The credit amount (amount left on your gift card) should be displayed next to your account name in the upper right-hand corner immediately after redeeming your card. The $$$ amount will decrease (by your purchase amount) every time you purchase something from the iTunes Store.
Yup. Choose none. That way your CC info will be removed and apple will not be able to charge your credit card anymore.