2016 BMW M4 Fuel System Gasoline Problems

I AM CURRENTLY IN LITIGATION WITH BMW USA OVER MY VEHICLE STILL ACCELERATING WHEN I LET MY FOOT OFF THE GAS. BMW OF COURSE SAID THERE ARE NO "FAULT CODES" IN THE SYSTEM SO THEREFORE THEY CANNOT VERIFY. BMW INITIATED A THEORY THAT THE TURBOCHARGERS ARE STILL SPOOLING AND NEED TO UNWIND. THAT IS WHY THE VEHICLE STILL ACCELERATES AFTER I LET MY FOOT OFF THE GAS. THE CAR WAS IN MOTION ON A CITY STREET ON THREE OCCASIONS IN LESS THAN 900 MILES. I TOLD THE ATTORNEY THIS IS WHY THERE IS A THROTTLE BODY AND A BLOW OFF VALVE SO THIS DOES NOT HAPPEN. WHEN THE THROTTLE BODY IS CLOSED, NO AIR GETS IN THE ENGINE SO THIS IS IMPOSSIBLE. THE BLOW OFF VALVE TAKES ALL THE PRESSURE OUT OF THE TURN SYSTEM.I OWN THE GTS VERSION, A VERY RARE 300 PIECES FOR THE USA AND ANOTHER OWNER...