transport damage

Hello, I have a question about goods that is damaged during transport. I specific case it is a paper roll that has become wet. The problem,it has rained like out of cans and the door must not be very dense,if the trailer moves and so the roll has become 1/3 wet. The unloader said it was a loading error the roll should have been further away from the door,good,loaded by a company was not by us. So,can someone tell me to whom the fun gets stuck? Yes, I think so too.Perhaps someone has something like that already through. thank you already.