Just to follow up on this story...
I got my car back after 3 days in the workshop.
Service manager told me the problem was just a faulty 200A "slow blow" fuse (I think its called)
It feeds power to the alternator and when it goes, the electrical systems start to shut down one by one depending upon the power drain.
They say nothing was wrong with the alternator or anything else for that matter.
The car seems fine now

The service manager said that this was exceedingly rare and that I was just UNLUCKY!!!
My concern is that if I was at a busy (and fast) intersection, I would have been wiped out!!! So he assured me that all problems with GTI and R32 get logged and reported back to VW Germany.
So there you have it... Happy motoring.