you haven't provided any evidence so there is no telling whether you are telling the truth or not. you said you meticulously recorded gameplay data, documenting bets, outcomes, etc.. would you mind posting here what you found?
anyway, I checked if they have an ANN thread in the forum to at least try and make contact with them, but I can't find one. looks like casino.guru has reviewed the casino, try posting this there and include all the evidence you have.
They deleted my history before the 20 of August. I wonder why, you can't even have access to it by typing the bet ID somewhere
Casino often delete game history that happened few days ago if you are active on betting. You can request it to their support if they have backup but I experience same thing on other casino that I’m playing. It’s not a good proof that they are cheating by hiding your bets
I'm just concerned on how come the bet ID is not searchable if their games is probably fair.
Nevertheless your assumption that they are manipulating the result just because you lose huge bets doesn't prove your accusation. You can try betting using same amount and provide huge sample with fix winning percentage to test the fairness of the game. A single or few sample for a probability based game will not help you determine whether the casino is rigged or not.