Cannot login to Email account!!! (New Comcast business account)

I am completely stumped! I cannot login to my new Comcast email account no matter what.

I created a username.mybusiness.comcastbiz.net email account successfully. But when I click on manage email to view my email account, I cannot get past the user id and password screen no matter whether I am using my Comcast email address or my regular email address that I used to open the account with.

When I try to use the Comcast business app to login on my IOS device, it crashes every single time!!! and I cannot get past the login screen.

What do I do? This is so frustrating. None of the Comcast business services (phone/email) are working for me. Comcast Business has been a hell-hole for me so far!