Payment apple care only

You need to have a credit card on file.

Apple Care is not listed here  ->  What you can buy with your Apple Gift Card or Apple ID balance

What you can buy with your Apple Gift Card or Apple Account balance – Apple Support (UK)

See -> Add a payment method to your Apple ID

Add a payment method to your Apple ID - Apple Support

See also -> Payment methods you can use with your Apple ID

Payment methods you can use with your Apple ID – Apple Support (UK)

fyi: Not all credit & debit cards seem to work with App Store / iTunes Store, try a different one, or preferably a credit card. If your card is not accepted as a paymenf method, you need to contact your bank.

You cannot, sorry.

You cannot specify payment methods for specific charges. Any payment method on your Apple ID will be used for all charges on your account including but not limited to Apple Care+.