There are massive sanctions globally against products from Russia including Russian oil, crude oil to reduce source of income for Russia and restrict their financial flow for their war against Ukraine.
It is a massive sanction efforts from the Western nations but there are always dark markets and Russia actually have some friendly nations to make business deals like China, North Korea, India and countries from Africa.
However sanctions actually reduce their income and their ability to buy and produce more ammunition, armed vehicles because no sanctions can be perfect in reality.
You are delusional to think that sanctions can help fight Russia. Already now, many countries admitted they're buying oil from Russia at a higher price then the limit of $60/barrel set by the EU. Market doesn't give a damn about sanctions and limits. In fact, it works the opposite way - sanctioned goods and resources are getting more expensive (e.g. grain after the grain deal collapsed, oil immediately after the war started etc).
Even if the sanctions would work, it wouldn't lead to Russia stopping the war. Russia is a self-sufficient country. Factory workers are getting their salaries paid in rubles, military personnel is getting paid in rubles. Even if ruble will go to zero, Russia would still continue producing tanks and rockets and paying their military.
Sanctions against Russia work, but not as effectively as originally thought, because the position of many states is not so unified, and there are many ways to circumvent them. Despite this, the sanctions are slowly and steadily eating away at the Russian economy like rust.
Sanctioned goods tend to rise in price initially because any such event causes panic in the market. The price of grain has also risen because Russia, after withdrawing from the grain agreement on July 17, began to deliberately launch missile and other attacks on the ports of Ukraine, destroying grain storage facilities as well. This causes a stir and additional panic.
