Crocs Demand Planner interview questions

Very unorganized HR. After two interviews I was asked by the Direct manager to prepare and present an assignment. HR called me to schedule and interview, than 2 minutes later canceled it saying they called the wrong candidate. I was a super frustrated for not getting ahead with the interviewing process, when after a few days the manager emails me to ask about the presentation! HR made a mess with me and other candidates. I presented the assignment that took me a while to prepare and they didn’t even bother to reply me with a negative. Management seemed very nice but HR is terrible