To change your email address, you can do it yourself by logging into your ET account and going to: https://www.electrictobacconist.com/customer/details/
If you can't login to do this, you can change your password by following these instructions: https://help.electrictobacconist.com/support/solutions/articles/9000180318-forgot-password-here-s-how-to-change-it
Submit a ticket