lets see, so far the worst I've done really was leave a guy with a 20ft tall 5ft diameter oak "stump" in his yard, his fault for lying to me when he said that there was concrete but only the bottom few feet, I spent $1500 more than quoted on a crane, and close to $400 in chains to bring it down from 40ft to the last cut at 20, dudes son showed up after we started and said "oh yeah its FULL" to be honest I should have quit when I hit the first piece at 40', I knew it would get worse and worse, yes I still billed him for the entire job, told him if he wanted me to continue to remove it that I would do so, at $400 an hour + all equipment damages, he refused, told me he should have called the other company that quoted $100 more, took all I had not to say "well its not too late to call them and offer them $100 to come finish the job"
also to OP, yeah you're an *******, "customer" should have sued you