It looks that they clearly want to get this sorted and are willing to discuss with your legal representative which is usually good sign. I don't wonder you don't get any information as it's very limited amount of people who usually have access to all this type of information which you have provided, most probably casinos rep is not included to them.
If they have any AML concerns about Source of Funds etc... it's just really normal that they don't share almost any information with you, that's called tipping and is one type of breach in AML regulation. You should be ok now if your solicitor will take this over, probably he/she have wider understanding for AML operations and can find way to provide documentation that satisfy casinos demands.
None of us here have seen whole paperwork and facts which you and casino can so it's impossible for any of us here to say if their demands are reasonable or not, i would take that as good sign that they are willing to solve issue with your legal advisor.
If they have any AML concerns about Source of Funds etc... it's just really normal that they don't share almost any information with you, that's called tipping and is one type of breach in AML regulation. You should be ok now if your solicitor will take this over, probably he/she have wider understanding for AML operations and can find way to provide documentation that satisfy casinos demands.
None of us here have seen whole paperwork and facts which you and casino can so it's impossible for any of us here to say if their demands are reasonable or not, i would take that as good sign that they are willing to solve issue with your legal advisor.