what if i only have one payment method?

The issue sounds like an issue with your expiration date. It’s now required that credit and debit cards have a 4 digit year. You’ll have to remove the payment method, restart your iPhone and then manually enter the numbers (do not use the camera), including a 4 digit year for expiration date.

Having subscriptions on your Apple ID account can compound the issue. You may need to add another payment method, using a 4 digit year, and then remove your primary payment method, and update the expiration date. Once the primary card is added back to your account, the secondary payment method can be removed.

Please follow the instructions in the Apple Support article I linked below. If the article doesn’t help, please follow the link in the article to contact Apple Support.

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

Are you entering the expiration date for the year as a 4 digit year?

What if I did that and it still won’t work

What is the error message?

It’s telling me to update my payment information but when I put the card details in, it say payment method declined even though it’s a visa debt card

Yes