Customer whaaaat?

How is it that Xfinity, when you hit their website, touts awesome deals to save a few bucks, but in the small print, "...for new residential customers only." So, if I'm a new customer, why do I have to SIGN IN!!!! If I'm a new customer you won't HAVE a account for me, .
I'm disabled, unemployed, and living in the middle of a pandemic and lots of us need some help. My physical location prohibits me from using another company. I dont have a choice. Thanks Comcast.