Enercare Home Services

We called Direct Energy to change 2 rental 18-year-old hot water tanks, the installers came on Sept 11 last week.
They didn't notify a $150 cost before start which they were supposed to do. When finished in 45minutes(might be a few minutes off, my friend is almost 80 years old), they said they checked some parts and a $150 charge on invoice. My friend didn't quite understand and signed the paper.
When I went back to check the job, the invoice shows no quantity, no model number, say" twin tanks w/ all shutoffs" and 150 dollars + tax. As a gas technician by myself, here is what they did: sanded existing cold water pipe( about 35"); sanded about 12" existing copper to the right tank( 10" and a quarter long from tee to 90 elbow); put a coupling to connect the other side existing hot copper to left tank, this side from tee to elbow is 11.5" long; the cold water shut off was wet and water marks on right tank which obviously it was leaking when installers left the basement; installers did the soldiering on water tank and burned 4 rubber sleeves around the water inlets and outlets; left a lot of extra soldering on tank like a dirty finish; the district installation manager Jeff told me their technicians made 20' copper(meant from the 2 tees to the 2 new tanks, which is only 7' total including new copper between shutoffs and new tanks, please notice: 7' include all those sanded length) in about 2 hours in the basement.
This manager called me twice for total 5 minutes just to tell me his technicians did right thing, and the biggest reason now for him to keep the $150 charge is that my friend signed it! What a service from Direct Energy, this manager Jeff also left his message on my phone this morning, say $150 is final decision, he doesn't want to see my pictures I mentioned on the phone. Does this mean Direct Energy set a manager as a police and a judge in the meantime?? The funniest story is from 1 hour ago(5:30pm, Sept 17, 2013 for clear follow up), the girl answering my phone said this manager went to my friend's house and checked the job, which is obviously not true, I confirmed with my friend nobody showed up and that mech room is always locked. I have the pictures to show all tech stuff mentioned above, I hope somebody will come to solve this like a judge, not a police and judge, like Jeff the manager.