Transmission Not Go Into Gear problems of the 2020 Hyundai Elantra

This is brand new car that I purchased 35 days ago that now has 1295 miles on it. I entered the street from a parking lot, there was heavy traffic at the time so I did need to excellerate rapidly when I pulled out. Unfortunately once I was in the road the car had no power and would not pick up speed. The engine rpm was increasing but the car was not picking up speed. Cars were on my bumper blasting their horns and I can't blame them, I'm lucky I didn't cause an accident. I tried to manually shift the car to see if it helps but it would not change gears and I was slowing picking up speed. I had to call Hyundai roadside assistance to come tow the car.