2015 Cadillac SRX Speed Control & Cruise Problems

I HAD MY CRUISE CONTROL SET TO 70 MILES PER HOUR AND WHEN IT WAS TIME TO EXIT THE HIGHWAY, THE CRUISE CONTROL WOULD NOT TURN OFF. I ENTERED A ONE-LANE ELEVATED EXIT. I APPLIED THE BRAKES, AND WHILE GOING 50 MPH, WAS TRYING TO TURN THE CRUISE CONTROL OFF AT ITS SWITCH. I SHIFTED THE CAR INTO NEUTRAL AND WHEN I PUT IT BACK INTO DRIVE THE CAR STARTED TO ACCELERATE AGAIN. I TRIED THIS MORE THAN ONCE. I HAD DIFFICULTY MAINTAINING CONTROL OF MY VEHICLE. AFTER GETTING OFF THE EXIT, I BROUGHT THE CAR TO A STOP BY PLACING IT IN NEUTRAL. I WAS NOW AT THE ENTRYWAY TO DFW AIRPORT AND HAD MY VEHICLE ON THE SHOULDER. AFTER TURNING THE CAR OFF AND BACK ON I HOPED THAT MAYBE I COULD DRIVE IT TO A PARKING SPOT, AS TO CALL A WRECKER AT THAT MOMENT WOULD CAUSE ME TO LOSE MY EXPENSIVE TICKET FOR AN OVERSEAS FLIGHT. AFTER I TURNED THE CAR BACK ON, I TRIED TO TAKE OFF TO MERGE WITH TRAFFIC AND FOUND THAT MY CAR WOULD NOT GET UP TO SPEED SO I PULLED BACK ONTO THE SHOULDER. I TRIED THIS AGAIN AND REALIZED THAT MY FOOT DID NOT REACH THE ACCELERATOR AS IT NORMALLY DOES. NOT ONLY HAD THE CRUISE CONTROL FAILED TO TURN OFF BUT THE ACCELERATOR WAS NOW STUCK DOWN. I HIT THE ACCELERATOR WITH THE HEEL OF MY FOOT AND IT DISLODGED. I WAS ABLE TO DRIVE THE CAR TO THE CLOSEST PARKING LOT. UPON MY RETURN I HAD THE CAR TOWED AS I WAS FEARFUL OF DRIVING IT.