Do this first, boycott other companies who make a profit with child-labor and exploiting the poor.
Don't buy from companies that steal people's water. Destroy the rainforest or harm animals unnecessarily.
I think this is far more important. Feel free to boycott shrinkflation on top. I try to do all of that if I get that choice and can afford it and have the knowledge available to me. But those products are also still on the shelves.