Withdrawals issued to credit cards, generally, take longer to process when compared to other payment services. Before the payment is sent to your card, it first has to be approved by the casino staff, which in itself can take up to two business days. Only after that is done will they actually send you your winnings. The transaction will be processed within 5 business days, typically, but if you requested your payment during the weekend or just before, you may have to wait a bit longer. Of course, this time frame does not consider local or international holidays. Still, this should not be a cause for concern; your payment will arrive eventually.