Yes. You’ll need to update your contact email address in your profile settings for My Vodafone to ensure you continue to get notifications for any actions taken on Marketplace.
This will also automatically update your log in username for Marketplace to this new email address.
You do not need to update your My Vodafone username to your new email address, but if you want to update it so they are the same, you can do this in the login section of My Vodafone.
Yes. You can update your email address in My Settings in the Marketplace. If you choose this as your primary email address, this will also become your new username the next time you log in to the Marketplace. You'll also have the option to set up secondary email addresses.