Of course, I am sorry for your lost OP but I see you said:
...Ok, logically they should take their 1 btc bonus back but they stole the entire balance of 2.45 btc. Support now ignores me and does not want to talk about it...
Terms and conditions are their weapons especially if you use the bonus. There is no connection between logic and the term and conditions of a gambling site that's for sure. You should read carefully the rules before deposit because there are plenty of stories like yours on the internet. The best way is to play without a bonus if one can afford this to avoid problems with conditions. Only wagering is sometimes so high that one is not able to fulfill and I haven't mentioned other written with small letters to take advantage on you. I hope you have learned a very costly lesson and never do this same mistake. Bitcointalk members will learn something from this story.