I've never heard of BTC trade India.
It's a scam for sure.
If you want to buy or sell Bitcoins, I'd recommend using a trusted exchange like Coinsecure or Zebpay.
That is same like saying "Coinbase is scam becasuse I've never heard about it."
Such comment can only come from an uneducated person. You can claim something only if you are able to support it with facts (such as delayed payment, etc).