You can ask Google to reset your @scorevolunteer.org or @nuevassonrisas.org (or any other organization, or even your private email account for that matter) password.
Try to log in as usual, and when you are asked to Sign In, click on the "Forgot email?" button. You may be asked to enter your phone number or recovery email, which is usually your private email, or some other question to help Google to identify you. You'll get a link to reset your password by email.
There are many ways that this may go, so give it a try first please. But if you can't figure it out or it just plain doesn't work, email the administrator for help: