Wow bro so sorry you are going through this. Sad thing is there are a lot of people out there who will take advantage or are looking to take advantage of you. What I would do is search for a free consulting lawyer there is even legit ones you can find on the internet where you can call them. Speak to one of them and if they can not help you but know of someone who can they often refer you to someone. I would contact a lawyer no matter what that is the next step. I would not even let him know you are contacting one I would contact one then if you want you can let him know you contacted one so he can see you are serious. You deserve your money as it was your game. Did you real all fine print to make sure you signed over no rights?? like owner ship or etc.