You mean like credit/debit card? Not sure if that's what the OP meant.
I guess so, OP said "around 250 EUR" and "with card".
Simply must be more to this than it seems. All of these scam accusers are Russian & they’re all within a very short space of time. It can’t be a coincidence, what are the chances of lots of micro scams all affecting Russian players? Foul play must be suspected.
Well, whoever they are they should get proper answer on why they can't withdraw their money, imagine you make a bet, you win and then gambling site tells you that you can't withdraw it because you have more than one account. And you say "I don't" and they say "You do" and that's pretty much it, no proofs, no nothing, your word against their. And there is that KYC thingy, why the fuck would they approve KYC, accept bet and then fuck OP over his winning?