oil change and fluid topoff

I had my oil changed the night before a trip to chicago for a funeral. This includes a fluid topoff. About halfway to chicago it started to snow and the roads got sloppy. It was also extremely cold. When a truck went by and threw up road slush I hit my wipers and washers. Nothing came out of the washers! There were some dribbles that froze on the hood instantly, but that was all! I was completely blind and was lucky not to be in a serious accident. We stopped at a gas station as soon as possible to put something else in the washer reservoir only to discover that whatever Dobbs had put in was frozen solid. We had to put 1/2 cup amounts in at a time, which necessitated several stops, turning a 7 hr trip into an 8 1/2 hour trip. When I called Dobbs to complain the manager said he would look into it and call me back. That was four days ago and not a peep from them. They obviously put in a seriously over-diluted version of the washer fluid. I'm sure it saves them money, but if someone ever is in an accident because of their negligence and sues them, it could turn out to be a false savings.