It doesn't matter how many transactions it had prior to this mate, in case you don't know bitcoin transactions are irreversible and the moment them funds went into his/ers wallet they was gone. They are not going to return them because you ask nicely or say how it was heading to charity they do not care.

You could offer them 2btc and they would still keep the 4btc, they went to the trouble of stealing them didn't they. Sorry though OP can't be nice, how did you get hacked to begin with? Is your computer still compromised? Also this should be moved to the service section, find it down in the left corner.

EDIT: (Actually that I am not sure where it should be thinking about it) lol more than likely service.