How can I help with this please?
Sorry but why are you scared?
Sorry if I am missing the point.
So why are you scared?
Who is threatening that?
He seems to be saying he will be killed.
none at all.
You have just been scammed. You will probably not recover your money but you have not committed any criminal offences.
Just stop responding to him and don't send money to people like this.
Can I clarify anything for you?
I am not a technical expert. I do think you can cause his emails to bounce back in some way.
Or you could just ignore him.
All the best.
Please remember to rate my answer.