my apple verification keeps failing after changing passwords etc

after changing passwords

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

You are sign in here .  .  .  with your Apple ID & Password.

Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.

You can’t merge multiple Apple ID accounts.

See -> Contact Apple for help with Apple ID account security

Contact Apple for help with Apple ID account security - Apple Support

See this Apple article: Sign in with your Apple ID

Sign in with your Apple ID - Apple Support

Cannot verify my Apple account