2008 LEXUS GS 350 Power Train Problems

2008 ES 350 SURGE --AS I WAS GLIDING (NO ACCELERATION) INTO MY PARKING SPACE IN FRONT OF MY TOWN HOME, MY CAR SUDDENLY SURGED FORWARD, JUMPED THE CURB AND CRASHED INTO MY BRICK TOWN HOME. I APPLIED MY TO THE BRAKES, AND THE CAR CONTINUED TO SURGE FORWARD. I CALLED MY LEXUS DEALER WHO SAID "THIS IS IMPOSSIBLE AND COULD NEVER HAPPEN AND YOU JUST ACCIDENTALLY HIT THE GAS PEDAL" . I DID NOT HIT THE GAS PEDAL. I HAD PICTURES TAKEN OF THE CRASH, WROTE A LETTER TO LEXUS OF NORTH AMERCIA STATING AND REQUESTING A DIFFERENT ES 350 (IT IS A LEASED CAR). I RECEIVED A GRAMMATICALLY INCORRECT LETTER BACK FROM LEXUS THAT WAS THERE NO REASON FOR THE PROBLEM AND THAT IS ESSENTIALLY WAS MY FAULT. I HAVE A COPY OF THE LETTER.. THE LEXUS GM OF SALES IN ALEXANDRIA DENIED THAT A SURGE COULD HAVE HAPPENED...