you can create your own site which will you escrow. My friend Alpesh is a bitcoin trader and he had too made a site accepting paytm, airtel money and mobikwik. You can too use this idea orelse start selling bitcoin on localbitcoin.
If you want i can provide you with his number if he permit, you can take his help.
Your Friend sells Bitcoin in price less than Zebpay? If yes, then please give his sites URL via pm, Thanks
9/10 sellers in India sell cheaper than Zebpay
In my experience if you really want great deals, you need to establish contact w/ some of the super-users at LBC