Help! Cannot use iCloud on macbook pro

Everytime i try clicking on my icloud icon i get a window asking me to verify my password. The issue is that i cannot verify the password because i dont have the email registered under icloud anymore. When i go to support it takes me to my new email/icloud account on the web browser but does not sign me in to my desktop application, it just asks for a password reset which ive done. The old email stills shows up and i want to remove it.