iCloud IMAP email account

I contacted you yesterday to ask about how I can delete an IMAP email account and the response was by deleting the email from the Mail app on the Mac

Indeed, I deleted all the emails in the mail application on the Mac

But the problem persists with me on my iPhone after logging in

settings, apple ID, name phone numbers, email

I find this email in contactable at

By clicking on edit, it becomes clear as in the attached pictures, knowing that I am connected to my mobile number on imassage and face time

As can also be seen in the attached photos

I may not have made my question clear yesterday, but now the question is clear

Please, please, help me to delete this email, I lost my mind because of this email ...I can't stand it being on my phone anymore

Thank you