So I used a visa gift card in the app store and eventually I finished it. Now when I want to update my apps I press update, it says "Sign in required. Tap Continue and sign in to view billing information" and it takes me to Payment Method and all of the gift card info is still there, but "There's a billing problem with a previous purchase. Please update your payment method". Well I don't have a credit card nor any other card to put in and there's no option to not have a card like there was before I put that card in... so now I have 6 apps that need to be updated, but I can't update them until I get another gift card or credit/debit card, right?