There's not a lot you can do. You've done work for the company, but it seems they have not compensated you for it. Legal action is possible, but would be a hor

There's not a lot you can do. You've done work for the company, but it seems they have not compensated you for it. Legal action is possible, but would be a horrible end. The code is under your control use that as bargaining power, but you need to actually intend to leave (but I wouldn't work on it, without a lawyer reviewing it, with the intention of continuing the project on your own, that could get legally hairy) with it if this is not resolved immediately. That said they've screwed you majorly already do you really think that would be the end of it if you got your 30%? I'd say demand 10% for the work you've done and for you to part ways amicably.