If Coca-Cola both stopped advertising and stopped officially selling their products (and permitting their import) in the region, then this doesn't prove what you claim it does. Disentangle the two things, and then we can draw some conclusions.

Coca Cola stopped officially selling in Russia but Coca Cola products are widely available due to grey import from other countries (it's present in literally every store - though prices are higher than for local brands).

Yeah, this tells us nothing at all. Of course people aren't thinking about Coca-Cola when there's a freaking war going on.