Account is incomplete

I signed up for internet last Thursday. I never received order confirmation nor a tracking number. When I sign into my account it says 'Thanks for  your purchase', then 'Accessing your account' with a bunch of personal info.

Phone support is useless. I cannot use the online automated chat. It wants to verify my account. Using both my phone number and email, it says 'that information does not match our records', even though I just signed in with that email...

I can't login to the email, it just loops me back to the search engine and news.

I found this thread: https://forums.xfinity.com/t5/My-Account-Sign-In-Xfinity-Website/UPDATE-FIXED-quot-We-re-getting-your-account-set-up-quot/td-p/3274393

But I can't even follow the solution because BOTH the email and phone two-step verifications do not work.