I was having the city inspect my sewage line to approve a sump pump installation, and they ran into sludge in the line and could not complete the inspection. We called Roto Rooter to clean out the sludge, and I mentioned on the phone call that we needed it to be flushed out (rather than snaked).
When the plumber arrived, I showed him exactly where the sewer line was, and explained that it needed to be cleaned out to fit the city's camera in. He proceeded to use the power snake on it, and as I have very little plumbing knowledge, I didn't question it. The water now drains faster, but when the city came back to inspect, they still could not fit their camera through.
I spoke to the owner of the company, and he was completely unwilling to do anything except send another plumber at full cost. He repeatedly tried to argue with me, insisting that I should have told the plumber to flush the line, and when I told him not to expect any future business from me, his response was that he had thousands of customers in this area. Obviously, the owner does not care about customer service/satisfaction, just about collecting his money.