my e-mail was cancelled and I don't remember my old password

For some reason my old e-mail has been deleted and I don’t reember my Avast password so I can’t change the old e-mail for a newone and keep my account going.Please, help me.

Hi,

Where are you trying to log in to? my.avast.com?
“old e-mail” as in email message or email account?
Can you please provide step-by-step details of what you are trying to do?