Refuses to pay honest winnings claiming mysterious ''technical default''

I've had the pleasure of trying some different Casino's and since I'm new to this world I was a little hesitant and worried what kind of people were running these sites. To my surprise I have to say I'm positively surprised. EVERY Casino I've won at have paid the full amount of my winnings. Some have been slow to pay out but with a little reminding they've always fulfilled their duties, except ONE.

ONE casino stands out: CASINO VENTURA
DO NOT PLAY THIS CASINO!!!

I played slots and won 2500USD on my first deposit that included a welcome bonus. I played through the wagering requirements. I then sent a request for a withdrawal to make sure this was ALSO an honest casino. I got a response that my withdrawal was denied. Nothing more.

I emailed the cashier but did not get a response at first.
So I asked in the chat. They looked into my case and found the following to say about the reason for my withdrawal being denied:
The winnings have been forfeited according to terms and conditions due to
fraudulent behavior and taking unfair advantage.

I then questioned how I'd been "fraudulent and unfair" when I've played exactly according to their requirements.
I then get a fairly surprising email that "the winnings have occured after a technical default and that they don't believe I was responsible for this" and that they've credited MY DEPOSIT back to my balance.... THANKS!

SO, they blame these winnings on a technical default on their end.. (the games were working fine all this time, by the way) and because of this they've stripped me from 2500USD and returned 100 instead. Perhaps they thought I'd be happy and could start over winning again... well, what's the reason really, when you can't win at this site without being "fraudulant and unfair" or that, God forbids, there should be ANOTHER technical default.

I've followed up and let them know that I will spread this at gamblers forums, not to be an ******** but to WARN other players of CASINO VENTURA. They brought it up for review with their management for further investigation and decided that the decision they took remains final.

Bottomline: they have admitted it's their fault and still feels I don't have the right to my honestly won winnings as you can see in the mail conversations provided via the screen dumps attached.
And more importantly, there is no breach of bonus terms, this is not a delay in payment. This is fraud straight up and down and I have the emails to prove it. They took a chance at not paying and I've offered Casino Ventura several times to resolve this matter but to no avail. I've been polite in my emails and the only thing I've done is to tell them that I will go to askgamblers and even so they decided to not pay the money.

Thanks for your time.

Best Regards

/Simon
simmespelet