Headlights Turn Off While Driving problems of the 2017 Hyundai Elantra

While driving down the highway my headlights shut off completely. Leaving us driving in the dark. It has happened multiple times especially when trying to use blinkers or switch high beams on or off. I took my car to the dealership and they say it's the multifunction switch and want 372. 84 to replace it. My warranty has just run out and I have already had to replace the thermostat and now this is out as well as the back door lock actuator. I bought the car new, it's a 2017. I feel the switch and possibly the back door actuator must be faulty.