hello Hispeed_User
Welcome to the community.
There isn’t much you can do, it it’s the main-email-account. You can call the hotline 0800 707 707 and ask them to add a different email-address or a phone number to the recovery-settings If it is a sub account, you should be able to sign on with the main account and then change the password..
Or you wait ’till tomorrow, @Daniele_Sunrise should be able to help you.