2017 Jeep Renegade brakes problems

Tl* the contact owned a 2017 jeep renegade. The contact stated when picking up a person at a community center, when the passenger entered the vehicle. The vehicle just accelerated on it's own. The contact stated they depressed on the brake pedal but the vehicle did not stop. The vehicle went a cross street and went over a guard rail. The contact stated their front driver side tire came off of the vehicle. The air bag did not deploy and there was no warning lights illuminated.

Took the jeep to dealer for pa state inspection . During the inspection it was revealed a problem with a rear disk brake. The inside pad has wore out do to not retracting. This jeep has a electric emergency brake. I feel that there is a problem with this system, causing it not to retract the inside pad. The pad a wore complely out damaging the disk. I had to have the rear brakes replaced. Jeep has only 23000 miles on it. I believe an investigation into the electric emergency brake not working right.