> I even wrote it not only per email but also in the "in-chat feedback" system

Yeah, I did the same. Before falling back to sending an email to support@mail.anthropic.com (which my blog post references), I had 3 separate Fin AI in-chat convos trying to get in touch with someone. All of them defaulted to the "ask for a refund" workflow that only applies for subscriptions and left me more frustrated than anything.