How can I get my credit card to work again

Hello Bingo53

Welcome to Apple Support Communities. I understand that you want to know how to get your credit card working again in iTunes. I am happy to help.

If you're receiving a message to contact iTunes Support I would recommend contacting them for further help. You can start by clicking on this link: iTunes - Official Apple Support

If you're not receiving that message and it keeps declining you can follow the steps in the article below.

If your payment method is declined in the App Store or iTunes Store 

You may also want to contact your bank and ensure everything is ok on their end.

If you want to change your payment method you can use the article below for help.

Change or remove your Apple ID payment information

Let me know if you have any questions.

Have a great day!