Cruise Control problems of the 2014 Hyundai Elantra

I was driving my 2014 Hyundai Elantra (that I had only had for 3 months, had 1,500 miles on the car) home from the airport, had my cruise control set on 55 for the previous 30 minutes, and I noticed the car in front of me was braking. Naturally, I pressed the brake as well to slow down, but the brakes did not work. The brake pedal was hard as rock and would not press in at all and therefore I could not slow down and cruise control did not disengage. I kept trying to press the brake as hard as I could, but the brake pedal was hard and would not work and cruise control kept accelerating. I pressed the cancel cruise control button on my steering wheel, but that did not disengage either. Just has I was shifting my car to neutral, my car rear-ended the Lexus in front of me. After my car struck the Lexus (my foot still on the brake pedal), I felt the brake finally press in and I was able to slow down and pull off the side of the road. The brake malfunction is still under investigation, but upon my own investigation, I found a recall of Hyundai Elantra year models 2007-2011 for this very issue that caused my car accident.