They weren't outright stopped, but there were attempts to drastically cut down on the purchases.Lol, the sanctions were never tied to oil/gas transactions. Both Europe and the US agreed long ago to remove them entirely if Russia were to end their senseless invasion of Ukraine. Putin seems hellbent on continuing to kneecap his own country, though, despite the fact that everybody else knows he has already lost.
https://www.forbes.com/sites/ianpal...n-oil-and-gas-didnt-work-and-now-we-know-why/
Europa's reliance on Russian gas and oil were one of the major things keeping the sanctions from having their full effect. Putin turn off the valve on his end to put pressure on Europe, claiming their was necessary maintenance due to leaks. Someone decided to double down for him.