Changed email, but can't change it on bnet?

Anyone know how to un-grey out your email on Bnet? I just had someone try to log in my account so I changed everything, but now my battle.net log in is greyed on my old email

You may need to use the ticket system to get this sorted if it’s not displaying the email you want. They don’t usually address account-level issues on the forum for privacy reasons.
https://us.battle.net/support/en/help/product/wow/181