I can’t add a new payment method??? My account is disabled?? Please help

This is primarily a user-to-user support forum; other Apple users like you. You will need to contact Apple Support. See instructions in: If a message says 'Your account has been disabled in the App Store and iTunes' - Apple Support

Hi, Did you enter the wrong password multiple times ? If you did that’s why it’s disabled. If you didn’t someone did so the account was disabled for your protection. As Fox recommended contact apple support and they will assist you.