William Hill Casino - Delayed payments and ''Security Check''

I NEED HELP AND ADVISE
I made my first ever deposit on a casino site after watching streamers online.
As i didn't want to affect my credit score etc i found William Hill would be ideal as they have a quick cash voucher option.
I made a deposit of £50 via quick cash voucher, after a brief play of slots i was up to £250ish .
I made a withdrawal of £210 via quick cash voucher (same method i deposited from).
I had receive help to locate my voucher code via Live chat as i wasn't sure how to find the code.

*HAPPY DAYS*
I walked to a William Hill store collected my winnings.

**WILLIAM HILL SECURITY CHECK BULLSHIT**
Over the course of the next few days i had carried on depositing £20 (total £220 deposited) here and there via quick cash voucher.
I have played various slots games and now i have £240, £60 and £170 pending in my withdrawals via quick cash voucher.
I was advised by live chat that there is a security check they do on all accounts and it will take 24-48hrs for a response.
It has now been over 5 days and i am getting the same response from live chat.
I have read other complaints on other blogs where people have had similar issues.
I have emailed my ID, Bank statement, Utility bill and bank card pictures.
I have been told my account is already verified and they don't need the document and for me to wait for a email from them.

I'm really upset at the poor service and the limited information from William Hill Live chat.

Please can i get some help or advice if anyone has ever faced the same problem and have they resolved it.