Create an Apple ID

Actually, it was refurbished, reset, but I found the problem: it's me who entered a nonexistent Apple ID, meaning everything is created on an invalid email address, so even when I want to change it, I can't, even though I have the correct password. I wonder, it's not like no one could ever make a mistake, even by just a single digit, so what to do? Knowing that they won't let me do anything without this false address that I can't use.

It needs to be reset again.

Hello Pool, we have "the right" to make mistakes, go to the website:
https://appleid.apple.com/#!&page=signin

Enter the identifier (with the wrong address) and when you are logged in, modify your Apple account.

If you really can't do it, contact Apple Support,
https://getsupport.apple.com/
Click on Apple ID
Click on Change your Apple ID
Choose Talk to Apple Support now.
You will need to provide a phone number and Apple will contact you; the waiting time before receiving the call is usually very short, sometimes immediately after you confirm, and it's free.
Fred.ml