Grosvenor Casino - Slow verification process

Good evening,
On monday 3rd September I opened an account with Grosevnor casinos and made a deposit of £1,000 through my paypal account. Now this paypal account was set up for me by my son in 2015, so it carries his e-mail address but its my account, registered to my address with my bank details and my cards.
I played roulette and initially lost the first £1,000 so proceeded to make another deposit of £2,000 and fortunately I won and managed to gamble up to a win of £6,777 in total. I made a withdrawal of £777 leaving a balance of £6,000 in the account. The next day when I went on the account it was locked. I received an e-mail (the same e-mail i used for the paypal account) asking for verification documents. I provided a picture of my passport & a utility bill as per the required criteria. I received no response from the casino so I called their support desk. After getting through I was advised that in their prevention of money laundering I would need to provide the copies of the PayPal transactions and the bank statements as proof of funds, Which I also have done. I have had no further response from the casino. I have left numerous messages with promises that they will call me back. They ignore my e-mails and just say they are very busy and pass me around to different support teams without any sign of resolution. They have taken my money and its over 2 weeks now so im very concerned and finding it all quite stressful that im making no progress. I have done nothing wrong and win the money fairly.
If required I can send all of my documents in support I really hope you can help me or let me know what additional information you need to assist me with this. I can send the bank details and transactions if you need them