WinTingo Casino - Non payment of winnings

I am very upset this casino said many excuses for not paying me i have sent in many emails for me and them I won the money in October 2016 on a no deposit bonus of $75 which I sent in pic of history of bonus I won the money off the bonus they gave me on the 24th of October of 2016 I tried to withdraw the winnings was 3550$us i never wagered any of the winnings i wanted to withdrawal it all and the casino has come up with a number of different reasons for not paying me then they asked me to letter from bank with very specific words which took me nearly a month to get and then they said they would honour the withdraw im not making any of this up i have many emails proving my case then the letter from the bank wasn't good enough even though it contained everything they asked they wanted it stamped then after I sent that email they said they would get back to me in 24-48-72 hours no email returned to me they keep saying i won the money off the card that is in my partners name which I have a joint account with him they i told them first this that we had a joint account I have sent them over 75emails trying to verify my account then ythey said i had to take it out in $750 increments so i asked to see some proof of this rule and they couldn't show me anything in writing i claimed my playing bonus which added up to 10$us and i had already had put in for one withdrawal of $750 then a man named Amos told me to withdrawal the rest of my winnings with added up to 2800 which the service officer told me to then they took my winnings for so many different excuses i had the winnings in my account for a month and had been knocked back and asked for so many documents even asked for my partners birth certificate and took a picture of him holding it with his face in it even asked for a letter of authorisation from my partner everything you can asked for i have many emails proving my claims that go back to last year im not making any of this up i need someone to investigate this and help me im disabled and i have done everything possible there keeping my winnings illegally and using excused that are not true