If you see a message that says "Your account has been disabled in the App Store and iTunes" or "You cannot login because your account has been locked", click here and read what to do ➞ https://support.apple.com/HT208856
Read the support article "If your Apple ID is locked or disabled"; it has solutions for two frequently encountered reasons for an account to be disabled/locked. Click here --> https://support.apple.com/HT204106
If it truly is a message saying a payment method is blocked:
Contact Apple. Click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.
or:
Contact Apple for support and service --> "See a list of Apple phone numbers around the world."
Click here --> https://support.apple.com/HT201232