I hope you paid on your credit card and not a debit or cash. Call the cc company and dispute the charge. Most banks consider paying with an ATM or debit card cash. If you give the PIN to the little machine, you as good as handed them cash and there is no way to dispute that.I learned the hard way.....
Sorry to hear that they screwed you. that sucks! keep grinding on the big boss and see if you can get something done. Don't be a dick to the big boss, cause if you came at them swinging, they will be defensive and less likely to help.