We are provided with evidence that the player broke following casino T&C:
"3.7. Multiple Player Accounts are not permitted. In the event that You attempt to open a second or more accounts, the Casino shall be entitled to block or close any or all of Your accounts at its absolute discretion or to allow You to maintain only a single account open into which all funds, if any at all, standing to the credit of all Your Player Accounts shall be consolidated. The Casino shall be entitled to deduct an administration fee equal to 10% of the balance of each of Your Player Accounts so closed, subject to a minimum of EUR 200 per account. Should You notice that You inadvertently have more than one Player Account at any time, You must immediately notify the Casino.
4.6. You shall not be involved in any fraudulent, collusive or other unlawful activity in relation to Your participation in any of the Games and shall not use automated players or any artificial intelligence applications or other software-assisted methods or techniques or hardware devices designed to influence or modify the outcome of any of the Games for Your financial gain or to provide You with an unfair advantage over other players. The Casino shall take action to detect and prevent the use of such methods and reserves the right to block or close Your Player Account and/or to declare any or all of Your winnings void upon suspicion of such behaviour.
4.15. Bonuses are restricted to one per person, family, street address, email address, telephone number, computer, IP address and debit or credit card.
7.1. The Casino shall have the right to block or close Your Player Account and/or to withhold any funds standing to the credit of Your Player Account in the event of any breach of these T&C by You or where the Casino has reasonable grounds to believe that such a breach may have taken place and to apply such funds against any loss or damage suffered by the Casino as a result of such actual or suspected breach."
We got all necessary details and proofs for this, so our final decision is to close this complaint and mark it as solved!