techrecovery | "Now listen to me, young man.."

".. I've talked to $important_person and they told me to tell you that we do not have a problem with $account_provider, so don't you tell me I have to go back to them, I want you to do your job and fix this."

(This after they had *just a moment ago* gone to $account_provider's website and attempted to sign in, and failed. Not a client app issue, proven and confirmed.)

Moral of the story: The perceived importance of the person who gave you the information is irrelevant, if the information they gave you is factually incorrect. Appealing to authority when making a demonstrably false assertion does not make the assertion true, regardless of how many times you make that appeal.

And if pride tells you one thing, and logic tells you another, and you ignore logic and go with pride .. I can't help you. And continuing to escalate the bullying will only make things worse for you in the end ..