I do not know English well
in short what can I do
they will kill me for it

Sounds like it wasn't your money, there is nothing you can do. You can try to get the authorities involved but if your government doesn't have an FBI or CIA I doubt that it would do anything. Sorry
Can the FBI and the CIA apply for me?
not in my government
No, I really doubt that they could, does your government have an equivalent?
please help,
send all my contact details to you
I can't help you, I really doubt anyone can. Take this as a painful lesson to not handle other people's money without being confident you can securely.
I'll say it again, your only chance at recovery is contacting any exchange the thief sends the coins to and proving they are yours.
Which unfortunately I doubt you can do.