2005 Volkswagen Gti

problem unknown, but I was driving at 40mph in 4th gear when my rpm’s dropped to zero and my battery light came on and I had a total loss of power and was unable to accelerate, when I pulled over and stepped on the gas pedal it did not rev and rpm’s stayed at zero. This was very dangerous. This happened again a couple weeks later driving in second gear when the same thing happened. The only thing I could do was pull over and restart my car and everything seemed functional again after restarting. I took it to an auto shop where they said it was my throttle body and cleaned it out but a week later while sitting in my car with the radio and air conditioning on my car does the same thing where the rpm’s drop to zero and battery light comes on, engine is still running, ac stops blowing cold, radio flashes off and back on and unable to apply gas as it would do nothing. I had to restart the car to regain function. The last time this happened I was stopped at a red light and again the Rpm’s drop to zero and battery light comes but the engine is still running, I have to quickly restart the car again as it seems the only way to reset it. This is just ridiculous and absolutely dangerous, how can a car just suddenly decide to lose all power to the gas pedal. If I was on the freeway or traffic I could cause a huge accident because of this issue. This needs to be fixed asap.