NHTSA Complaint #11450042 — 2021 TESLA MODEL Y

I was traveling in -5 degree (Fahrenheit) weather and the cabin heater stopped working (a notice appeared on the screen explaining that it was malfunctioning). Windshield began to fog up, so turned on fan and outside air in order to remove the fog. Ended up driving 8 hours in -5 degree weather with outside air coming in the car. Seat heaters and steering wheel heater continued to work. My passengers and I had to wear coats, boots, gloves, and a hat and still got numb hands and feet. I felt this was a dangerous situation, unable to keep warm while driving or when pulled over. Manufacturer looked at the issue and said the refrigerant was slightly low and replenished it. I don't feel confident that this was an actual fix.