Without specifics you're not going to get much in terms of help but at first glance if they are raising funds on your code then you should contact a lawyer with your license in hand to get his opinion on how to proceed.
I am not saying this is a case that he would want to take on (only he could say that, and without knowing more details, it sounds to me [a non-lawyer] as though the entrepreneurs are deceiving the investors while obeying the terms of your license).
But google is your friend here.