Gunsbet Casino - Will not pay huge ‎€6,400 win due to unclear and unproven accusations

This is my first win in this casino - actually quite a big win. I won 6 400 EUR in this casino on the ninth of April. I have done the account verification , had no problems with that. But today I got the email from the casino saying that my win won't be paid to me, the casino gave no good reason for taking away my win. They just stated the following - The Player is not allowed to use any strategy in playing with an active bonus in order to fulfill the requirements to wager the bonus. If the Player uses such strategies, and if the Casino has sufficient grounds to believe that the Player's actions are aimed solely to obtain financial benefits using the bonus advantage, then the Casino reserves the right to cancel all Player's winnings. What is this ? With this term the casino can just do whatever they want… They can just stop paying to every player, who has a good win in the casino. Obviously, i want my win paid to me.

Dear MONYARJA,

Your winnings have been confiscated for repeated using of gaming strategy.
As per or rules, the Player is not allowed to use any strategy in playing with an active bonus in order to fulfill the requirements to wager the bonus. If the Player uses such strategies, and if the Casino has sufficient grounds to believe that the Player's actions are aimed solely to obtain financial benefits using the bonus advantage, then the Casino reserves the right to cancel all Player's winnings.
We've made an investigation and found absolutely same behavior of you at our other projects which gives us every right to assume that you abuse bonus as advantage as well as specific gaming scheme exceptionally to gain financial profit .
Your deposit has been returned to your account which you can withdraw
Our casino strictly follows its rules
Thank you for the understanding!

Best Regards,
Gunsbet Casino Team

Well, this is confusing. Before this win i had actually lost all my deposits in your casino. I have put 400 EUR, what kind of strategy are you referring to? I think i was lucky that last time, that is it. If having been lucky is not restricted in your casino I would like to get my win paid..

Dear MONYARJA,

We've provided all evidence to Askgamblers team and now we are awaiting their reply in the topic

Thank you for the understanding!

Kind Regards,
Gunsbet Casino Team

Hi!

Ok, I am looking forward to your reply.

AskGamblers Complaints Team have been in direct communication with the Gunsbet Casino management over the past couple of weeks in an attempt to reach to a fair and justified decision, based on rock solid and unambiguous proofs. Unfortunately, AskGamblers Complaints Team have not been provided with enough valid evidence on behalf management of Gunsbet Casino which could prove the accusations in general and breaching specific bonus/casino term/s in particular. Therefore we have no other option but to close this complaint as Unresolved, and recommend to the player to forward their issue directly in front of the relevant regulatory body. As soon as AskGamblers Complaints Team is being notified about the regulator's final decision on the case, we will comply and mark this complaint accordingly.