Communism is a post-Socialist society, it must be global, highly developed, and have full public ownership, or close enough to those. The Soviet Union was, instead, Socialist, ie an economy where public ownership is the principle aspect. That being said, there were attempts at Cybernetics, and moving beyond money. These are actually incredibly interesting, and anyone interested in Socialism should look into those attempts.

If you want to learn more about Socialism and Communism, I recommend checking out my introductory Marxist-Leninist reading list.