Send a support ticket, you should be able to provide information you'd know to both recieve a new password and restore your accounts contents from the archive, assuming it is still archived (last login 1st of july, im assuming you mean that wasn't you, and pw not working is a bit suspicious).

Once you have the password you should be able to log in to update your email address, you'll probably want to submit the request to restore your account from archived status as a seperate ticket afterwards.