Car Accelerates On Its Own problems of the 2014 Lexus IS250

On Dec. 2, 2014, I was entering a walgreen's parking lot in my leased 2014 Lexus is 250, which I had owned for only 4 months with 1740 miles. Moving at 5mph or less, I turned the wheel to enter a parking space, when the car suddenly accelerated and took off. I pressed the brakes to the floor and nothing happened. The car jumped up over a planted median filled with bushes, trees and a phone pole. The front tires became lodged in mud and that stopped the car. I missed the telephone pole by less than 1 foot. Luckily, I had an individual witness the entire episode. I telephoned Lexus emergency services and Lexus customer relations immediately. The car had to be removed from the median by a tow company and was taken to the dealership where purchased. After examining the car from Dec. 3-Dec. 10, the dealership claims there is body damage but no mechanical problem with the car. The dealer called on Dec. 10 saying the car was ready to be picked up. I noted inaccurate data in the service report from what I told the service manager originally, and I was given no information as to follow-up on this matter. I was simply told that Lexus corporate had been out to see the underside damage to the vehicle. (front bumper, paint, cracks on base of bumper), and that I would hear from them in 10 days. I called Lexus corporate and was told that the matter is now in the legal dept. And that it would be far more than 10 days for a response. Rather, I could expect a call in 4/6 weeks or longer. I am now driving a leased vehicle that I am very scared to operate, not knowing when a similar incident could occur where I could be killed or injure or kill someone else. Lexus, particularly the dealership, appears to be wanting to distance themselves as far from possible from finding a suitable resolution.