If I am "homeless" researcher, where can I get affiliation?
Affiliation isn't a commodity to buy and sell.  It is simply a statement that at the time of researching and writing this article, you were affiliated (as a student, employee, or similar) with a particular organization.

From your question, it sounds like at the time of researching and writing the article, you were a student or employee of Chelyabinsk State University, so standard practice would simply be to list your affiliation as "Chelyabinsk State University".  If you are not enrolled or employed there any more, then list a "current address" stating how to contact you.

Ethically, if you feel that CSU contributed nothing to the work, and you did it on your "own time", then you could omit it; in which case, you would list no affiliation at all.  But this would likely be perceived as a petty insult to CSU, to the extent that anyone noticed it at all.

Affiliation should be determined only on the basis of what you were doing while you prepared the article.  Anything that happened after the fact is irrelevant.  You can't "get" a different affiliation for a paper you have already written.