When you receive Free Spins through registration or a promotion, please be aware that both the Free Spins and any winnings derived from them are valid for 48 hours. If the Free Spins are unused or the winnings remain un-wagered within this timeframe, they will automatically expire.
If you're having trouble locating your Free Spins, kindly refer to the following article:
I just claimed my Free Spins but they aren't showing in the slot