I had filed a patent earlier in India and have got the patent granted from one country through PCT. At that time I had selected only one country and I have missed the PCT deadline. Can I refile a new patent with same information and little more enhancement in India and file for PCT in few more countries?
You mention that you already got a patent granted and you followed the PCT route upon which only one national entry followed. This means that both the granted patent and the PCT are published and form now part of the prior art.
If you file the same patent application, the PCT and probably the granted patent will be cited and destroy novelty.
So no one will stop you from filing a copy of an old patent application, but it will be a waste of time and money. Don't do it.