To withdraw funds from your Quppy IBAN account you can use the TransferWise service (transferwise.com) or any similar service.
You can also withdraw your funds from your Quppy IBAN account on any of your euro accounts, opened, for example, in Alfa-Bank (Description: Transfer of own fund to account ___________ of Ivavov Ivan Ivanovich in Alfa Bank) or in Raiffeisen Bank.