Dear hirokann0525,
I have now received the necessary information and evidence to understand the whole situation and the actions taken by the casino team.
Unfortunately, after gathering all the necessary information and evidence, we are rejecting this complaint as unjustified due to breaching the casino's terms and conditions - multiple accounts linked with the same IPs, devices, cookies, etc. All of the accounts took advantage of the bonuses, the same or very similar bets were placed in the same games, which can’t be considered as just a mere coincidence. Casinos have a very strict policy regarding multiple account cases that have been used in this way.
This is one strict measures about casino finding out you are using multiple account to access their platform and abusing their bonus or any form referral bonuses from their site. Like you said, they always have strong detective mechanism that helps to monitor every single account to make sure they don't violate their terms and conditions, and in this they don't usually list it to the gamblers because that is the most valuable part to them and they used it against gamblers.