Cex.io is the best place for indians to buy Bitcoin and some other Alt coins.
it is very simple to buy from your visa card.
Steps-
1-Go to Cex.io site (link)- https://cex.io/r/0/up110580603/0/
2- Sign up (1 minute)
3- verify (5 minutes)
4- Add your visa card
5- Deposit money
6- Buy your desired Coin in the internal exchange.
Everything will be super fast and easy.
link to cex.io- https://cex.io/r/0/up110580603/0/