The trouble with going after the shipper/receiver is that you're burning big bridges for $550.00.. not worth it imho.. Much smarter to hold off and worst case scenario you contact the shipper to sell your services direct.. you're further ahead doing that than attempting to make them pay the $550.00.. they won't like Stargate and they won't like you much either if you do that..i.e. you might lose 550 but you get an account and an ongoing stream of revenue..i.e. something along the lines of "hello my name is Trans.. your supplier Stargate has not paid us for services rendered, and instead of adding insult to injury by asking you to pay twice we'd like to service your account directly in the future."