Casino doesn't pay a non-bonus player

On the 25/12/2010 I made a 100 pounds desposit at Windows Casino and played. I didn't receive any bonus i just played for my own money and won. I finished with 950 pounds which I asked to withdraw the same day. I have been asked to send identification documents which I did. The casino replied few days later asking for another utility bill which I sent. Then they wrote me that the address i gave and which appears on the bills is actually not a residential address adding it is an office which is not registered on my name. I called them and explained that while registration I gave my rented office address and all the bills are from there (although I don't own the office I get some bills there). I told them I did so in order to protect my privacy. I added that if they want me I will send a utility bill of my residential address which I did. However, the casino refused to accept my documents and decided to lock my account for "security reasons". They just "forgot" to pay me my winnings.

I wonder what is the reason for such an approach which treats a player very warmly when he registers and makes his deposits, but once he wins a little he starts to be considered as a criminal... I am willing to supply all that is needed in order to verify my identity since I got nothing to hide. The simple fact that a rented office address was registered on its landlord is a common fact.

Please help me to solve this problem and get my money eventually.

Thank you,

< name removed >