2012 BMW 128I Vehicle Speed Control Problems

PULLING IN PARKING LOT TO PARK GOING AT A VERY LOW SPEED I HIT THE BRAKES AND THEY DID NOT HOLD INSTEAD THE CAR ACCELERATED AND JUMPED ON TO A SIDEWALK AND THEN INTO A BRICK WALL. I FINALLY WAS ABLE TO GET THE CAR IN REVERSE AND IT TOOK OFF BACKWARDS FOR A FEW FEET UNTIL THE BRAKES FINALLY CAUGHT THE CAR THEN CAME TO A SUDDEN STOP. I HIT THE BRICK WALL WITH THE FRONT END OF MY CAR CAUSING LOTS OF DAMAGE TO THE FRONT OF MY CAR AND THE BUILDING THE AIR BAG NEVER DEPLOYED. THE POLICEMAN THAT WORKED THE WRECK SAID THE TIRE MARKS WHERE THE CAR TOOK OFF WERE ACCELERATION MARKS NOT BRAKE MARKS, BUT THE ONES WHERE IT FINALLY STOPPED WERE BRAKE MARKS. *TR