Hi there.
Due to global sanctions on Russia and Belarus, CEX.IO, as a regulated entity, has implemented temporary measures. These include the suspension of deposits, withdrawals, and trading for accounts held by users residing in Russia and Belarus. I've observed that the support team has requested additional verification information from you, which you've provided. Your case is presently being reviewed by our compliance team, and I've escalated it for urgent attention. You can expect updates soon.
Good to see that Cex.io Bitcointalk account is active and trying to resolve the customers issues. I hope that OP issue will be now resolved very soon. I also request OP to update community about what happen in this case.
May I ask one question, why CEX.io has not direct verification system yet? some days ago I faced same issue where OKX exchange ask me re-verification but it was all happened in OKX exchange (not through email) and verification completed in 30 seconds. Cex.io should also work on it to make their system smooth for users.