When you already have a password for your customer account you can just log in and change your email address yourself.
If you still have access to the email address but have lost your password you can reset your password here.
If you don’t have a password yet and you don’t have access to the email address anymore that you used for purchasing we will need to update your account manually. Please contact us with as many details as possible that we can use to locate your account and verify your identity.