4 different Phases of interviews first get to know you interview then technical interview which will be a practical interview and also Another technicall interview which is more question based

I was rejected after the first interview then I was called back because a new similar position opened up I was given just one day notice for the interview which went well. After this second interview the Hiring Manager told me they hadn't taken a decision yet. However, the recruiter had already sent me the rejection email. I just wasted my time they probably just needed to fill the pipeline.