Supposedly there was a consecration done in 1984.
Then I have a question for you: If you know of the 1984 consecration, why do you refuse to believe it? I’m afraid your problem is not a lack of evidence but an obstinate refusal to believe.
It should be said though that the request in question was for a consecration of Russia to the Immaculate Heart of Mary, not to Our Lady of Fatima. Perhaps you should re-read what the Church has to say about the private revelations at Fatima.