To me if you have been using that site to gamble and you also made some withdrawals from the casino there is nothing to worry about, I think you should just have patient while they proceed everything manually and I like know manual withdrawal takes more longer time than automatic withdrawal.
When you submit your kyc details and they still keep it pending it's assumed that there are other pending applications which they could take time to verify manually. I was actually thinking it was your first time of withdrawal, you shouldn't have worried yourself creating this over here rather than reaching them to their Ann thread.