Putin has threatened so called unfriendly states to pay in rubles or have its gas supply shut off. It has said it doesn't buy things for free and so isn't going to charitable with its energy.
Europe has kicked against this with Germany saying its being blackmailed by this move. What other choice does Europe has with Russia alone selling about 40% of energy to the world.
Turkey's president says that "he doesn't want to see his citizens freeze to death". European countries certainly can't refuse it even though they insist, do they already have other alternatives to meet their domestic oil supply? this is very smart politics from putin to fight sanctions from the west and oil is the most exclusive basic need right now.