Alternator/generator/regulator problems of the 2013 Volkswagen Golf

On two occasions, about two weeks apart, the power cut off while driving. The car became very difficult to steer. The alternator light came on. After turning the ignition off and on again once or twice, the car started again, and the light was no longer on. On the first of these occasions, the car was being driven on a city street. It was a minute or two after first starting the car that day. The second was also on a city street. This also occurred just after starting, while turning a corner. On a third occasion, about one week before the above-mentioned two incidents, the epc light came on and power was diminished, but the engine did not cut out totally. This occurred on an expressway, after the car had been driven for some time. After dropping in speed, the engine returned to normal before the car stopped. Both problems would appear to be electrical problems. Vw customer service told me that as there was no light on the dashboard, they could not diagnose the problem. Needless to say, this is a very dangerous problem.