BEST Towbars in Tascott NSW 2250

I brought my brand new van into Narara Trailers to have a towbar and electronic unit installed. I new the price quoted was considerable higher than it should have been but they were willing to do it on Saturday so I agreed. When I went to pick up the van I was told that the wiring was very difficult and the boss had to come and help. I also noticed that the cutout for the bar in my brand new bumper looked shocking. On Monday I had to put it to work. After a few hours the electrical system failed and the van would not go into gear, I had no brake lights, and most of the engine indicators we on in the dash. At the dealer they explained that the wiring for the tow bar was causing the problem and it was the worst they had ever seen. They found that the original wiring had been moved and had contacted the bar and shorted the electrical system. I now have to pay more to have the system rewired.