Cruise Control problems of the 2009 Toyota Scion Xb

I was driving in a 35 mph zone, I set my cruise control. When I tapped the cruise control up 1 mph my car accelerated to almost 57 mph. I had to hit the brake to get the cruise control shut off. This happened again about 5 months later, I was on the highway, my car accelerated from 65 mph to 80 mph, I again hit the brakes to shut off the cruise control. This resulted in a speeding ticket, since the officer had no interest in my vehicle trouble.

The contact owns a 2009 Toyota Scion Xb. The contact stated that while driving 65 mph, she began to decelerate and approximately seven hundred feet later, the vehicle accelerated independently. The vehicle was taken to a dealer for diagnosis where the contact was told that she must have accidentally engaged the cruise control. The failure recurred and the vehicle was returned to the dealer where it was found that the battery had been disconnected. The failure recurred but the dealer stated they could not find a cause for the failure. The vehicle also experienced brake failure. The vehicle had not been repaired. The VIN was unavailable. The failure mileage was 8,000 and the current mileage was 39,000.