If I understand your question correctly, you contracted with the GC and the GC was contracted with the corporation--you did not have an agreement directly with the corporation. If that was the case, then you have no recourse against the corporation, since you were not contracted with them. Your recourse would be against the GC, which had agreed to to pay some percentage or amount to you. When A contracts with B who contracts with C to do the work, even if the ultimate source of money is payments from A, if C is not paid, it has to seek the payment from B, which the party with which it is in a contractual relationship.If the above is not the situation, please repost your question with some additional detail about the contractual and work relationships, so we can better help you.