New customer unable to complete identity verification

I’m a new customer trying to order Xfinity Internet. I created a new Xfinity ID and successfully verified both my phone number and email.
When I enter my correct date of birth during checkout, I get “Unable to verify your identity.”
After signing in, Account and Identity also shows “Something unexpected happened.”
I have tried a private browser window and also created a completely new Xfinity ID with a different email address and phone number, but the same issue still occurs.
Could an Xfinity employee help me complete the identity screening or check the account from your side?