The email address for the account is displayed in the 'Company Details' section under the idAuthority Option.
To locate the company details section follow these steps:
1. Login to your account.
2. Select the idAuthority option
3. Select the Company Details button
4. Locate the 'Admin Contact: Personal Details' section where the email address assigned to the account can be viewed
If you require a change to the admin email address please provide the details of the change by submitting a ticket at http://support.comodo.com
Please note that all changes to accounts will have to be validated before being changed, so can take a couple of days to complete.