Automatic Transmission Torque Converter problems of the 2015 Hyundai Accent

This is the second time I'm reporting this defect. I bought a brand new car on 11/28/2015 less than a week later while driving the normal speed limit the car began to power down and the engine light and battery light came on. I had to put the car in park then restart the car again this happened several times. The car was towed to the dealer to be serviced. I was told a new transmission was needed, the the torque converter locked up and this is what caused the car to power down and engine light and battery light to come on. Anyway a new transmission was put in the car and I was given the car back. The car was in the dealer service shop for a week. Now less than a week later the car is doing it again, powering down while driving, then engine light and battery light comes on. This is a safety risk!!! I have a child I fear for our life. I reported this to consumer affairs, bbb, the potamkin Hyundai dealership where I bought the car, Hyundai customer service,nhsta and anyone who would listen!. All I get is the run around, well, this is going to bethe second time the car is going to be serviced for this safety risk.