I don't know about there being nothing Government Liquidation can do about it... more probably there is nothing Government Liquidation will do about it.
They were at fault, you followed the rules, they should make it right. Since the trailer hasn't been auctioned off yet, they should give it to you. It is yours.
I was at a live DRMO auction quite a few years back, and I was bidding on a mill that I really wanted. I had my paddle up for the whole time. The hammer came down, and the auctioneer sold it to some other guy. He told me there was nothing he could do about it. I pressed the issue, and made quite a stink, and others in the auction started joining in, and he finally relented and continued the auction between just me and the other guy. Thankfully it only cost me another $100 over what it should have.... still way less than I had planned to pay.
Fight for what is yours.
-Chuck