You can change all of your personal information including your email and username through "Wallet > Settings > Profile", simply follow the instructions to complete the change.
Q1. What if I forgot the password my registered email?
If you couldn't access to your registered email, please write an email to support@oursong.com, our customer support will guide you through the process and request for the information needed for the change. Otherwise, you could always change your account details through your settings.
Q2. Why is my email a random set of numbers and alphabets?
Please refer to this article.
Q3. What if I log in with a third party platform, but I want to change back to "email login"?
Please refer to this article.