Login Issue – Work Blog, Person Left

Hi –

The person who managed the blog for our company left and did not leave the password. We tried to reset the password to the email on file but since the person has left, that email address is no longer valid – so we are unable to get the password reset. How can I add an email address to an existing blog (powered by WordPress.org) when I can not log in or is there someone who I can contact about trying to get a temporary password for the associated email address?

Thanks,
Emilie