Error message when trying to log into my account

Hello thank you so much for taking the time to reach out to us on our Xfinity Community Forum. I'm very sorry to hear about the trouble viewing your account details once you log into the Xfinity My Account. This may happen if you are logging in with a non-primary username. Have you checked to ensure that you are logging in with the primary username on the account? This will give you access to the account's bills and to make changes on the account, etc.

Same issue here and no at the store or customer service or online support seems to know how to fix the issue. They say I don't have a User ID, but they sure do have something in there system to make sure they get my payment monthly.  This is not a basic issue, so please don't post those basic text book responses.