I asked them if they can specify what they mean by that but they didn't answer."The account was closed, due to irregularities in sports betting, advantageous and dishonest bets, the last withdrawal will be processed and no more"
I've been using this site since November 2018. I placed 196 bets, lost 108, won 75 and 13 bets were voided/refunded. I've made 13 successful withdrawals à 500 EUR which is the maximum amount you can withdraw per one transaction. Didn't take a single bonus.
Keep away from this site. Seems like they are broke.