Air Bag Not Deploy problems of the 2016 Chevrolet Malibu

I was driving northbound on I-435 when avoiding an accident. I pressed my brake as hard as I could. My vehicle did not stop so to avoid causing a serious accident I went off road in the center of the two highways. After hitting the guardrail to stop my vehicle from falling inbetween the overpass. My airbags did not deploy . I feel some concern after having my breaks checked and told they were good. Then if I'm at stop and I release the break for my car to start back up. I give it a second and then press the peddle it does not move which has almost caused me to hold up traffic or almost being hit when vehicles were at safe distances.