My Comcast.net email account appears to have been migrated to Yahoo Mail without my asking or getting my permission

I can successfully sign in to my Xfinity account using my Comcast.net/Xfinity credentials. However, when I click Email, I am redirected to Yahoo Mail. When I enter my full Comcast.net email address at Yahoo, Yahoo says my password is incorrect.

I have never successfully logged in to this Comcast.net mailbox through Yahoo, and I have not authorized or completing a Yahoo migration.

I need Xfinity Support to check whether the Yahoo migration/provisioning for my Comcast.net mailbox completed correctly and help restore access to my email. I would also like the migration authorization/consent history reviewed.

Please have an Xfinity Support representative contact me by Direct Message so I can provide my account information privately. Thanks!