Ok here we go. I had this same thing happen and even with the new rate con broker still refused to pay. Took me 5 months to finally get the pay. Delivery (Amazon) was Monday, they said it was next Monday after I showed up. I held the trailer a week and delivered it. I charged $2,000 extra to the broker (JB Hunt). You also have the power to reject their cargo claim with your insurance. Then the only way to make a claim for the cargo is to sue and you will win with the texts and paper trail you have.