They technically can take however long they want with their KYC process, and can provide results with whatever it is they might have received. Note that checking of KYC is still done in person so who knows, your KYC check might have just gone under a group of lazy asses so it was rejected. Simply adopt a try again attitude imo and resent your KYC documents, this time in a state where there's no way they'd have issues with, maybe scanning it instead of taking a photo.

But let's be real, let's not blame anything but ourselves for our losses. You could've opted to, well, idk NOT gamble? It doesn't matter really how your funds ended up staying in your casino account. It didn't ask you to gamble it, so it's no ones at fault here but you.