After the ban of Exchanges, P2P exchanges are doing good in India. Among all P2P, WazirX is clearly the best choice. It is very easy to buy/sell on WazirX.
Just deposit your Bitcoin in WazirX wallet, then sell it against USDT pair and finally sell USDT for INR on P2P. The volume is pretty fair. If your amount is below 20K INR, it will take 10-15 minutes maximum to clear all your order. If your amount is more than that then it might take little more than hour to completely fill your order.
I have heard many times of WazirX and I thought they send INR to the bank but if you only get USDT and then finally have to go for P2P, what's the point of using WazirX? While dealing with INR, P2P is not at all safe.
So what other options we have? After ban from RBI, it is not possible for any exchange to send money in users' accounts from its own account. WazirX is no difference. It is also a P2P network. I know P2P is not completely safe but I prefer using it for amount up to ₹50,000. Hackers mainly use hacked accounts for bigger trades hence you will find mostly genuine buyers for lower amounts.
I don't have many contacts over internet so P2P is my only solution at the moment.
I also sell Bitcoin for PayPal sometimes but this method has two drawbacks: first the exchange rates are not as good as P2P. Secondly, PayPal asks reason and source for any kind of receipt. So the reason you mention on PayPal has to match with your ITR which causes additional obligations.