They need to verify everything first, it can take a day or two.
They need to find the spins, check they are for real money, check the are as a result of a spin done during the promotional period 3rd May to 10th May, get all the verified wins that qualify a player for a prize to Skylined, Valid entry list made, raffle scheduled and eventually drawn.
Its only been 4 working hours since the close of the promotion, can't expect it all to be done in this time, especially as it's just one promotion of many.