If calling is not an option for you, feel free to try our live chat team. They're available Mon-Fri at 5AM - 6PM Arizona time (UTC-7). When they're available you can start a session with the buttons located at the top or bottom of this page. Our agents will be happy to help you get the email address updated on your account or domains as needed.
You can also try updating this yourself using the instructions in either of the two articles below:
My Account > Workspace Email > Manage > Edit Email > Save > This will change the status to "Pending Setup" for around 2 minutes & then it will work perfectly.