I've been in business for thirty years. Shit happens. The guys at Oyster Bay that worked on my tanks busted their asses to get it done, staying until 8 PM on a Friday night to finish up. As it turned out, part of the tanks were inaccessible because of modifications made to the boat by a previous owner. Complaining about the guys at Oyster Bay or the mechanic in Ossining that didn't tighten the access cover down accomplishes nothing.
Instead of bitching when things don't go right, I prefer to be pragmatic and just deal with it.