Apple Card disabled but I payed for it

hello, you might need to contact Apple support to see why it was disabled if they able to tell you the reason. Or go back to the retailer and request a refund. Also I recommend you purchasing apple gift cards on the website and not in a store it’s safer that way. There’s a lot of scams going on with physical gift cards. Even if you bought it and haven’t used it.

See this Apple article:  If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card

If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card - Apple Support

Beware of -> About Gift Card Scams -> About Gift Card Scams - Official Apple Support 

If you still need help, get support from Apple directly -> Get Support or call Apple in your region see -> Contact Apple for support and service or check -> here for more support and assistance.