Dealer drives car without permission

In June I took my 2010 Ford Escape to the local Ford dealer for a scheduled service and handed over my keys for the service to be carried out. I was asked if I had any specific problems, to which I replied no. On entering the dealer's car park I reset the tripmeter to zero. When I picked the car up after the service I was amazed to find that the vehicle had travelled 33.8 kilometres while it was in the dealer's care. When I asked them to explain how it could be that the car had been driven that far while they had it I was told that they had had problems with another Escape with a major vibration issue at 100 km/h, so they decided to see if my vehicle experienced the same issue, even though I had reported there were no issues whatsoever with the vehicle. I explained to that I was not happy and that I didn't consent to my vehicle being used as a "comparison" vehicle, and that they should have had the courtesy to advise me that the vehicle had been used for this purpose. I left the service department extremely dissatisfied with the lack of answers and angry at the blatant breach of trust shown by the dealer. On top of that, when I got into my car to drive off I found that my radio station had been changed, the air conditioner was on and the climate control was set to a different temperature, all of which raises serious doubts in my mind as to whether my vehicle was test driven for a specific purpose or used just to pick up the lunches" for the workshop boys. I now suspect the later. I am extremely unhappy with my vehicle being used in this manner and the response received thus far is unacceptable. I won't be using this dealer again, and would think seriously about buying another Ford if this is the level of service they give.