Account closed and balance confiscated due to unjustified accusations

Few months ago Planetwin365 frozen my account with all my money.I have about 1500euro on my accaunt,and i cant take my money back.They told me that i play collusion with some another player but it is not tru.I ask them if they wont to sent me hands that they think what is suspect for them,but they dont wont to send me enything.What i can do to back my money.