To do this, log in to your current Billetto account and then click on your account name in the top right hand corner of the screen.
Here, you can edit the personal email address that you use to log in to Billetto. Note that you'll need to confirm the change by entering your password.
After that, you should click on Public profile, then Edit, where you can also update your email address. Click Update profile to save the change.
Note: If an account already exists with the email address you are attempting to change to, an error message will be generated and your attempted change will be unsuccessful.