How to sign out an locked Apple account

My iPad's Apple account keeps showing a recurring alert: "This account is locked and cannot be used."

I’ve tried all the suggestions on the support page, but everything keeps going in a loop.

I’ve tried using Forgot Password and Reset Password, but the same "Account is locked" alert pops up,

preventing me from proceeding further. I also submitted a request to regain access to the account but received an email rejecting my request.

I want to try creating a new account altogether, but I realized I cannot log out of the device without the login password.

What should I do to unlock the account, or just sign out to

start all over?