@13rhysf Hi there.
First of all, you need to prepare all your documents for the KYC approval - photo of ID, proof of address, proof of deposit method you had used (bank or e-wallet), plus possibly even a selfie. You can check these requirements in the casino's T&C.
Approval may take a few hours to a few days, depending on the speed of the casino's approval team (KYC Team).
If no rules or terms had been breached, then your withdrawal claim would not face any issues, but payment speed may vary quite a lot!