I guess what happened from a script within my browser . where i setup avast security in my device , and i hope from any one to recover my fund
Sorry. There's nothing you can do to get back your funds. Bitcoin transactions are final and non-reversible. The only thing you can do right now is to delve deep more into security, and make sure this doesn't happen again in the future. Best of luck.
Sad reality but its true!
There is no more way to refund your bitcoin if it was lose in your hands. I believe that phishing sites killed his.3 btc. It should be a lesson for all that we need to install anti virus and do not easily click in website bait. Just like what our wallet told to us, our keys in our hands. So, we should be liable for it no matter what happens.