I registered with Naukri hoping to get a better job. I keep receiving emails about "employers who saw my profile" but don't get to see who, when, or why. The only thing I discovered recently, as it happened to a few friends of mine, is that other employment companies started communicating with me. The got my details from Naukri and they ask for money provided they submit my CV to the employers.
As for communication, Naukri is completely unreliable. If you write a bad report they'll protest as victims and after that, they would go silent again.