2014 Ford Fusion cruise control problems

I was involved in a major collision on thursday 8/27 at approximately 3:30pm. While approaching the intersection to make a right turn, I removed my foot from the gas and attempted to brake, but rather than slow down, my car accelerated. When I pressed the brake all the way down it still continued to accelerate until I hit another vehicle which finally stopped my car. I am lucky no one including myself died- this is absolutely unacceptable.

I have lost ability to accelerate while driving on highway and vehicle would not go above 40 MPH on I-20, a 70MPH road system, car jolts or jumps even without foot on accelerator so that I have no control over the car's acceleration. Gas gauge jumps wildly and randomly from 22 mpg to 99 mpg. Brake lights and other lighting systems remain on when car is completely shut down and headlights and interior lights are turned to off position.