I can't add a bank card to the App Store and Apple ID. shows "failed to confirm payment information"

Start to check the network connection:

You need to have a good Service and/or Wi-Fi.

Charge the battery > 70%.

See also -> If you can't connect to the App Store, iTunes Store, or other Apple services

If you can't connect to the App Store, iTunes Store, or other Apple services - Apple Support

-> If you tried all of the above steps and you still can’t connect, contact Apple Support.

Try to verify your payment information, you need to -> Sign in to your Apple ID account page and edit / update your Apple ID details -> https://appleid.apple.com                                                     

• On the Sidebar click Payment methods -> then tap Payments Methods and tap Manage payment method.

Or see -> Add a payment method to your Apple ID

Add a payment method to your Apple ID – Apple Support (UK)

• If you want to change your card, you need to add first the new card, then remove the old card.
• or if you use your Apple Account balance, you need to set your Apple Account balance as your default payment.

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

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

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Russia

• Apple Account balance (from redeeming App Store & iTunes Gift Cards or adding funds)
• Mobile phone billing5
  • Beeline
  • MTS

You can use your Apple Account balance, see Add money to your Apple Account balance

Add money to your Apple Account balance - Apple Support

Or you can use mobile phone billing as an Apple ID payment method.