While the story is for the EU, in the US at least, write a polite, but firm letter to the chief or general legal council. A letter the the CEO of a big company may just get intercepted by an admin and shipped down to the "tier-1 monkey" you mention. Lawyers seldom get letter they can blow off and will by habit read it before shipping it off to the meat grinder of tier-1. If you can't find their legal eagle then any person in legal will do. LinkedIn is your friend here. Smaller companies may only have outside council to contact. The other place to hunt for help is to see their "about us" pages and find their advisers, investors and leadership, and reach out to those people. If they get a call from their VCs you can expect your issue will get noticed.