replaced both cables on my 130 honda

I just got the boat and noticed a brake in the hot cable motor would not start I left the boat on that Friday went back on saterday morning. had to wait about 1 hour for the owner to get there.he handed me a bill for 300.00 dollars in should have only taken 1/2 hour to replace he also broke the clip on my battery box and never told me I have to replace the whole cover but had the nerve to leave it on the boat so I could find it when I got home I tried to start the boat it would not start I called the owner he told me that the battery had arked and I would need to get a new battery he never mentions that all the bus wirers were rusted and needed to be replaced. what a joke I have owned my own buisiness for many years and would never treat my customers like that I finely found a nice shop who fixed the problums don't use this shop you will be sorry you have been told.