Speed Control Springs problems of the 2007 Ford Fusion

While l was driving on wet pavement with the speed control engaged and set to 35 mph, I rounded the top of a hill and the vehicle began to speed up as usual. I applied the brakes lightly to maintain 35 mph and the speed control failed to disengage and spun the left front tire until black smoke was rolling out from under the fender. It lasted a few seconds before it released. I had a Ford dealer check the brakes to see if the left front caliper had a problem and they did not find a problem. They also had no solution for the speed control failing to disengage. Note: the daytime phone is useless since I am assigned to another building at work away from the phone on my desk. Updated 01/28/lj I contacted Ford once again after the third throttle problem. The third time involved the speed control burning rubber on a wet road after I applied the brakes to maintain speed going down hill with the speed control set for 35. Their response was to ignore the problem as usual. They didn't do anything for any of my complaints even when the car was under warranty. The dealer would not ever replace a broken plastic door handle in the inside until it broke off completely. After they replace it with another plastic handle the spring cut through the plastic again, but I realized that the piece of plastic the broke off was still in the recessed area for the handle and would have caused it to break off completely again if I had not removed it. The chrome also pealed off and cut my fingers again so I scraped it off the top of the handle. They still haven't changed the design of that. For over $21,000 that I paid for the car, they could have at least made one out of aluminum.