Considering the pro-Kremlin tenor of your other posts, it doesn't surprise me that you have a problem with the Ukrainian people in general.
As for the Russkies, they've been using this as a weapon against Ukraine for years. I think right now they've raised the price by 85 percent, though I could be wrong. I recall it was a large increase.
They raised the price to the going price. The EU said they would sell their stored (or stolen) supply to the Ukraine at a nickel less.