2017 VOLVO XC60 Forward Collision Avoidance Warnings Problems

I pulled my car out of the garage, I saw I had not taken the trash out and had my foot on brake. the car has an automatic shut off at stops to save gas. It shut off, I jumped out thinking it was "off" as there was no engine sound. The car started back up and started going forward. I attempted to jump in to hit the brakes ... it kept going and hit side mirror, door, me and then kept going! it never stopped! crushed me half in half out of door. my friend jumped in stopped it from passenger side and then started it up to back it up and remove me. I was taken to trauma with fractured pelvis, broken lumbar, cracked ribs and a concussion and stitches! this is supposed to be one of thee safest cars. my family owns 3! the sensors did not...