About me

I am looking for help on comcast.net email. I had an account 2 years ago that went with Comcast. Then I changed and went to Gmail. Now I am back and still want to use Comcast mail. I got this new Xfinity and log in as Gmail account name, not Comcast. So how can I fix this? I think it's my log-in name problem. Any body have a clue on what I can do?