Pay Safe Card 10 euro away?

Evening, I want to keep it short… Have bought for 10 euro at Fortnite on my PlayStation something… There was such an offer for 5 euro… I have indulged me. Only the problem is, the remaining 5 euro are gone? How can that be? It's about the game Fortnite

The remaining 10 euro must still be under the code, otherwise you have made a mistake