Did you have O.T.P activated for Knight Online service while you got hacked?
If not, then you probably won't be restored unless customer support decides to restore stolen items for accounts without OTP again. (I don't think we'll see it happening any time soon..)
However, if you did submit a ticket anyway, they should be able to catch whoever stole your items and punish him/her accordingly.
But as I said, I highly doubt your items will be restored.
For your own sake, make sure you start using O.T.P from now on, else you'll end up hacked again.