2017 BUICK VERANO Structurebody Problems

I WAS PULLING INTO A PARKING PLACE IN A RESTAURANT PARKING LOT AFTER TURNING OFF A CITY STREET. ALL OF A SUDDEN THE CAR WAS LUNGING FORWARD INSTEAD OF STOPPING. IT HIT A STEEL FENCE CABLE WHICH PUSHED IT ONTO A METAL FENCE POST AND STOPPED. THE 4 SIDE AIRBAGS OPENED UP AND THE ONE BY THE DRIVER HAD TO BE CUT IN ORDER FOR ME TO GET OUT. MY THUMB WAS JAMBED AGAINST THE STEERING AND LATER FOUND TO BE BROKEN. I WAS IN SHOCK AND NOT SURE WHAT HAD HAPPENED OR HOW. IT MAY BE THAT MY FOOT SLID OFF THE BRAKE WITHOUT MY REALIZING IT, BUT I HAD THE SENSATION OF THE CAR BEING TAKEN OUT OF MY CONTROL. I AM THINKING SOMETHING WENT WRONG WITH THE BRAKES BUT SINCE THE CAR WAS DECLARED A TOTAL LOSS AND NOT ROAD DRIVEABLE I WAS TOLD THERE WASN'T ANY...