$100 rebate not received

I signed up for service in February - waited the required amount of time, received the form for the rebate and filled out said form and sent the form in along with the invoices that were requested. Mind you - these invoices were downloaded directly from HughesNet's website. Then i received a letter stating that the documentation i supplied (i.e. the invoices that they asked for that were again, from their website directly) would not work to be able to receive the rebate. Tell me, please, if the invoices that you asked for that i gave you from your own freaking website doesn't suffice what exactly will? Riddle me that one batman.