Can somebody advise me on what to do here?
Lawyer up... potentially sue the LLC. Anything else probably puts you in a worse situation.
Sue over 40 shares?
Well, they were worth more than 1 BTC per share at IPO - over 180 Leu is also something, isn't it?
Also depending on your insurances (you can insure against legal expenses quite cheap), something like this might anyways be covered. Reporting at the police as the bare minimum is surely free and depending on your country's standing with the US could also already create some attitude changes in the LLC that holds our shares hostage.
Also if you fill these forms, if Giga goes down, you're going down with him. He has an LLC - do you?
I do not think you can do what he did and retroactively move to an llc on a whim. That wont fly.
The longer this is delayed, more bs piled on, etc.. The better for the operator. People are getting played right now. It is so easy to see. Apply pressure now.