Lost order

Buffalo has lost my order, I have been calling for the past three weeks trying to get the signature of the person who recieved it, until now they have given me no help at all,they keep telling me to call after 2days and if I call they tell me they called the person and confirmed delivery but they can't tell me who that person is so I can personally start looking for my order that they lost. I am so drained right now... My money that I worked so hard for down to vein just like that because it's clear I will not get any help