2013 Mazda CX-5 cruise control problems

Pulling in to parking space with foot on brake. Vehicle would not stop and couldn't turn the steering wheel. Car suddenly accelerated and jump curb and ran into side of building. Brake pedal was hard to press and even tried pumping brake, but vehicle would not stop. Engine speed did not change when pumping brake. Vehicle was only three weeks old and had a major malfuntion with braking and steering.

On 2 separate occasions (5/27/2017 and 6/15/2017) while on the freeway while in stop & go traffic, my vehicle suddenly seemed to lose power, and unable to go more than 20 MPH. The tire pressure, traction control, emergency light comes on. Both times I have safely been able to make it to the shoulder. The first time, I had my car towed to auto repair shop. Their $300 diagnosis reported nothing wrong with the car. The second time, I turned my car off & on again on the shoulder.