I will say yes you can buy bitcoins using your debit card
SERVICE CHARGE (*9% ONLY FOR PAYTM)
Here is method
First of all You need paytm wallet Upgraded wallet will be better it has 1 Lakh limit
Load your wallet with your Debit card and Done
Note Normal paytm user has limit of 10K per month so Load 4000 max
Afterwards Use this site
https://trybitcoin.in/product/buy-bitcoin-with-paytm/
Go and buy Bitcoins with paytm wallet
Trust me this site is amazing Try with Low Amount first (Minimum 0.01 BTC Which is about 444 Rs)
Thanks a lot "newinbtc" for accurate details on trybitcoin.in, they are the quickest exchange service.