App Store

you may find the fastest route to resolution would be to accept the invitation to contact Apple for assistance with this.

To contact iTunes Support, do this:

1. Click on this link --> Choose your country or region - Official Apple Support

2. Select your country

3. Select: Billing & Subscriptions

4. Select: Subscriptions & Purchases

5. Select: Update payment method

6. Select a chat session or a phone call.

Is age a factor? To set up a credit card for purchases, I believe you need to be 18 or older.

Does the Billing Name match the name on the Credit Card including the Zip Code of the billing address?

Is your Apple ID associated with a Family Sharing plan?

The image simply had a message saying to contact Apple Support.