Horizontality, Holocracy, Corporatism

Hi! I need an explanation about the difference between horizontality, holocracy and corporatism. I ask it due to a quarrel between me, an anarchist, and another person who is a communist. He accused me of being fascist because I structure society into horizontality because of the fact that it uses class collaborationism. I need an explanation to understand if there's a bias. What do you recommend me to read about the organization of an anarchist society and horizontality? Thank you in advance!