I am experience is similar to a lot of other people who have expressed their frustration with the kind of treatment they have received by Godrej. I guess what makes it worse is that all of us may have been led into believing that a premium brand like Godrej will not resort to the kind of bullying tactics that you expect from local unrecognised builders. Although, what you experience is just an organised version of thuggery.
In my case I was coxed into registering an unfinished apartment, although the registration document mandates that the flat should be ready for possession before registration. Since then, I am being hounded for full payment of the flat, with no intimation on whether the flat is finished or not, despite my repeated requests for updates, one just receives excuses. On top of that, they have been using this to charge me interest for non payment.