Might depend on whether you withdrew before the ballot date - if it was after then you might not get it back. Not 100% sure though, best to ring the entries secretary and check.
you won't get the sticker back to use again as far as i'm aware, but you should still be able to use the sticker - by using its correlating number, if you do an online entry to your next event
that only possible if the event is taking online entries though i think