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.