2021 Volvo S60 T8 Polestar Engineered 4 DR AWD

While I was going down a small side street that is a hill, the air conditioning system suddenly went off and immediately the entire car's mechanisms ceased. The engine stopped and the car was unstearable and the brakes were not working. I had my foot on the brake and that was not responsive, the car slid with all electrical systems not working and the brake not holding the car or stopping the movement of the car. I could not start the car to get the engine going.I could not stop nor start the car that slid into a major street that is a thoroughfare for a hospital. I had no control of the car at all. I attempted at least 7 times to start the Volvo that requires keeping your foot on the brake and turning a small switch that is located right next to the cup holder. Nothing would work. I called Volvo On Call who instead of immediately helping told me to call 911 since the car slid into the middle of the major street and it was an emergency regarding my safetly . A police officer came after a few minutes and blocked the traffic. Meanwhile, I was suddenly able by the 9 or 10th time to start the car and move it to the side of the road. The police officer drove in back of me literally a block away from where the Volvo dealer just happened to be located. There were no warning messages prior to the car ceasing. The car is now in the Volvo dealership who upon receiving it said that I must have gotten the ignition switch wet. This is totally false. I did not have any liquids nor should that be a reason why a car suddenly stops and becomes a piece of metal in the middle of the road. What's worse was that there is no emergency brake on this model. My life was in danger and I am lucky that I was not hit. A passenger got out of her car and stood next to mine in the middle of the road with oncoming traffic coming at my driver's side. Volvo dealership is claiming it's the starter switch and it must have shorted. There is a defect and safety problem requiring investigating.