2022 Subaru Crosstrek Brakes Problems

I was driving on the highway in stop-and-go traffic when suddenly I found myself depressing the brake pedal to the floor and the car would not stop. Additionally, the eyesight function that prevents forward collisions did not alert for obstruction or stop the vehicle. I was able to put the vehicle in park and then tried to reengage the vehicle, but the brakes failed to respond. I was in the middle lane of a major highway. My vehicle could have harmed someone else, in addition to myself, and I was also at risk by being stopped in the middle of traffic. I could have died, had I been traveling at actual highways speed. No lights or warnings were on in the vehicle before, during, or after the incident. As of now, the dealership has been unable to replicate the issue, thought they still have the vehicle. They have not been able to identify the cause of the issue, but have also been unwilling to put the tests they have done in writing for me at this point. At this point, I have little confidence in my vehicle, despite it being a 2022 with low miles. I am terrified that this intermittent issue could happen again. The week prior, I had an experience where the acceleration and braking were not functioning as expected, but I had just pulled out of a parked position and this resolved after putting the vehicle in park and reengaging the vehicle.