Speed Control Cable problems of the 2009 Honda FIT

I was driving a 2009 Honda Fit sport into a parking space at the store with my foot on the brake and speed was appropriate for pulling into a parking space ( approx. 3-5 mph. ). At approx. 4-6ft from the parking cement block of the space, the vehicle unexpectedly accelerated with a violent surge and the rpm needle shot up to the top of the gauge and with in seconds I hit the large cement/metal handicapped sign/pole at the front of the parking space. The engine was still making the loud reving noise after the collision and the only way to stop it was to take out the keys. The only thing that stopped the car was the cement/metal pole. The car jumped the parking block and hit the pole. If the pole had not been there, somebody could have been killed as this car was no longer under my power. The airbag went off and I have serious contusions on my chest and side ( I assume from the airbag and seatbelt) and my right leg was injured as well. The bumper, hood and airbag, seatbelt were damaged, but the engine had no damage as far as I could tell. I contacted the dealership (west hills Honda bremerton) where the car was bought and serviced regularly and they said they couldn't help or did not want to. The service manager mike, called and left a message saying he has heard of this happening, but to call Honda America, which I did. The claims rep. (jennifer p. ) for Honda America had us meet a field rep. (robert) at dealership to perform tests. And of course they found no problem. As a sua does not leave a footprint when it happens. They did find obd2 codes po171 and po400 and said they were caused by crash. They also said the tire pressure light code was appearing even though the tires were fine when checked. The service manager mike said it could be an electronic problem. Hmm do you thing the electronic throttle cable might have a problem too? I will be seeking legal help!.