When you log-in using your Facebook account, it may pull in an email that is not relevant to your business (the email address associated with your Facebook profile). Though you will continue to log-in using the Facebook method, you can update your contact information to another email address.
Log-in to your Woobox account. In your dashboard, click on your email/business name in the top right corner, then in the account panel, click Account Settings.
Click User Info, update the email, and click Save. Now your contact information will be associated with the updated email, and invoices will be sent to the email address in the field.