I have a strong love/hate relationship with all this App Store oligopoly. Love because often they are weeding out apps with security/privacy concerns. On the flip side, cases like this where you are 600 feet buried in red tape trying to talk some sense into someone at the company.
You can try to talk to someone at Google, but good luck with that. I think you’re doing what’s best now. Shine a spotlight so far up Google’s hooter via publicity about your case that someone higher up catches your attention and remedies the situation.