Hello and indeed one or the other will definitely know the game Fortnite Battle Royale and the currency there to buy skins or something is V-bucks and I still had 950 V-bucks on my account when playing with my friends today If we had a 1,100 ping when we went out of the round I had bought the game Battlepass levels and now 600 of my V-bucks are gone for help.
I'm sorry. Whatever that was a mistake, usually it is not possible to return Battlepass levels. And thus you will probably not get your VBucks back.
But you can complain to Epic Games, maybe they'll help you.