Cruise Control problems of the 2015 Chevrolet Equinox

Was driving up ramp to get onto highway when car accelerated to 80 mph without my foot on gas pedal. I turned the cruise control off and I pressed on break pedal but the car did not want to slow down. I pushed harder to get car down to 65 and then released break and it accelerated to 85 mph. I then put both feet on break pedal and pushed as hard as I could at that point I kept both feet on break pedal until I got car off the road and stopped at that time I put car in park. The engine had slowed down and I turned the key off. I then turned the key to accessory pushed cruise control on and then back off. Shut key in off position then started the car and have not used the cruise since. All I can say is thank the lord there was no traffic or it would have be a tragedy.

Driving down highway at 11:15pm, using cruise control set at 62 mph, applied brake to slow down as I entered small town. Coming out of town passed slow vehicle, sped up to around 65. Took foot off gas pedal and pedal went straight to the floor and stuck. Forgot about my onstar. Tapped pedal a couple times to unstick it, nothing. Applied brake a couple times, nothing. Stood on brakes, just jerking down the road. Looked and was up to 85 mph, pushed cruise control button to turn it completely off. Nothing was helping. Finally the pedal popped back up and hit the bottom of my foot, and we were able to finally slow down. This was a very terrifying experience and I am afraid to drive my car.