what i should to do?

sended wrong person 250fg

and he doesnt answer my post

Send them a PM to kindly ask them to return the fg.
If they are online and have not answered or returned your fg after a reasonable amount of time you can create a topic in the Scammer Accusations: https://forums.d2jsp.org/forum.php?f=250
Make sure to save a copy of your PM to the sent folder.

thank you, sendede new message, lets see and waint :/