The developers provide users with a page where you can reset your password based on the registered email address, but if you don't have access to that email, then the account is lost and no one will restore it back to your. That's the purpose of the email address, to recover the account when there are issues with the password.
However, you can give it a try using the feedback form: https://support.snapchat.com/co/other-feedback
Add as much information as you can and then wait for the response.