No one deny that he did not receive money. There is no scam in bitcoins if you have the bitcoins in your wallet it is 100% yours.
This is inaccurate, there is scam in bitcoins, and your wallet can be hacked amd your assets stolen. Never 100% trust any system or technology. Just maintain the highest level of security.
he is talking about confirmations and the fact that bitcoin does NOT have a charge back option which means when a transaction is confirmed and is deep enough in the blockchain (usually that means 3 confirmation but 1 confirmation is 99% safe too) there is no way it can be reversed so the certain scams that involve charge back are not possible with bitcoin.
you are talking about getting your wallet hacked which is not a bitcoin related problem.