I am not russian and the same issue happened to me. I sent several docs for KYC (and extras, totally proving who I am) and did the Veriff thing successfully. However, they also seized my profits.
You can not be stereotyping here, because this is not about nationalites, this happened to me as well!
Please keep patience and wait for their reply on your thread. No one have rights to seize your fund without proper reason.
I just checked tge accusation you created against them and you provided multiple emails screenshots there. From all your provided informations i got that they seized your fund for violating their T&C and if i am not wrong then they blocked your account due to using multiple account. After checking all from their end they sent back your fund and provided transaction link on the last email.