Vehicle was service at a Hyundai Dealer for routine required maintenance to continue the warranty. Less than 24 hours later I was driving my special needs, handicap daughter to breakfast and pulled into a handicap parking space and placed my foot on the brake. The pedal seemed to not have any tension and go to the floor. The emergency collision warning went off, but the brakes did not work. The vehicle jumped over a parking curb, knocking over a handicap sign, going across the sidewalk, hitting a garbage can and finally coming to a stop in a brick building.