It may take a while to get used to the new format. But Comcast would not change your email address. Are you sure it's been changed? Are you looking at the primary or a secondary account?
Hello, and thank you for reaching out to us. I would be happy to assist you from here.Can you verify your account information with me? I would need your phone number, full name, and service address. You can private message me by clicking my name and clicking private message.