I hate to say it but there is a way, they'll just delete any record of this conversation in public chats and move on.This is how Project Helius operates. They don't give a damn about their community. This much is clear and there is essentially no way to ever undue this blemish on their history with confirmed evidence.
They've been doing this for years. It sucks but the only place users will learn of it is on forums like this, and if their regular subscribers visited places like this before subscribing they wouldn't have subbed in the first place.