You are special kind of moron. Gazprombank can use Euros on its accounts any way it wants. There is no any sanction restricting Gazprombank of using Euro. Money-market instruments are Gazprombank bonds, idiot, securities that are traded on market. They are under sanctions.
Since 1st of April Gazprom by decree of President is not allowed to sell gas to EU without full payment in Rubles to its account in Gazprombank. Failure to pay in Rubles will stop the supply of gas. Gas was already cut to Finland, Bulgaria, Denmark and Poland for refusing to pay in Rubles.
Seek some medical help.