2019 BMW 530I Vehicle Speed Control Problems

I WAS ON A TOLL ROAD/FREEWAY OVERPASS CONNECTING TO THE 91 FREEWAY IN TRAFFIC GOING 60 MPH WHEN SUDDENLY MY CAR STARTED BREAKING ON ITS OWN (NO CAR DIRECTLY IN FRONT OF ME). I TRIED TO ACCELERATE BUT WAS UNABLE TO. MY CAR CONTINUED BREAKING AND SLOWING, THERE WAS NO WHERE TO PULL OVER, AND FINALLY I COASTED TO THE 91 FREEWAY WHERE I WAS ABLE TO PULL OVER. THIS WAS EXTREMELY DANGEROUS TO LOSE CONTROL OF ONE'S CAR IN SPEEDING FREEWAY TRAFFIC. THERE WAS NO WARNING SOUND OR WARNING LIGHT, EXCEPT FOR THE 3 RED PEOPLE HEADS THAT INDICATE YOUR BACK SEAT PASSENGERS NEED TO FASTEN THEIR SEATBELTS, BUT I DIDN'T HAVE ANY BACKSEAT PASSENGERS. I CALLED IRVINE BMW TO REPORT MY CONCERN AND THEIR RESPONSE WAS "I CHECKED WITH A BMW GENIUS WHO SAID YOUR CAR IS FINE SINCE THE LIGHT IS NO LONGER ON.