Forgot Snapchat Password and Registered Email, No Linked Phone Number

I forgot the password for my Snapchat account, and I also can’t remember the registered email address. Unfortunately, my phone number wasn’t linked to the account. While I know my username, I don’t remember which email address I used to create the account. Could you please help me retrieve the email address associated with my account? Additionally, I have changed my phone. I'm looking for assistance to regain access to my Snapchat account.