Wheel Bolts problems of the 2002 Ford Focus

I kept hearing noises in the front passenger side of my car so I called the dealer and told them this problem along with faulty windhield wipers , noises in the transmission and a radio that plays when it wants. I brought the car in for repairs . They did the repairs on the windshield under the warranty, and said the radio was not defective and the faceplate was broken (it is not), and the noise that I am hearing in the front of the car was due to me replacing a flat tire (in the rear of the car) with a tire not the same as the other three. Well I was driving the car for about 300 miles after being at the dealer and went to make a left turn at a traffic light. The right front wheel( not the tire) went rolling into the highway and myself and 2 toddlers went to the left and into a business parking lot. After being towed to the dealer, the told me that they do not recall telling me about the noise I heard , and due to the fact that the tech that worked on the car did not write the results on it that they were not resposible for the wheel falling off and to get my car off their lot before they have it towed off. In the event of the wheel falling off it also caused $1000. 00 damage to the front quartepanel and door. I had to have the car towed to grand sport auto for repair and I have to pay for the damages that my insurance will not ccover, along with a rental car.

The cap which just presses on over the lug nut on the tire is just pressed on, and comes off easily, leaving just the lug nut which the tire wrench is to large to remove just the nut.