Itron Systems Test Engineer interview questions

1st HR call, 2nd manager interview and then 2 panels. The manager interview was not very technical mostly behavioral. The panel were technical with some behavioral. The questions are mostly around your experience and projects, and they explain the job description.

After a very pleasant initial screening interview, I was told I would be contacted via phone by the end of that week regardless of if I would be moving onto the next stage of interviews or not. Over 3 weeks later and I receive a generic rejection email. This wouldn't be so incredibly unprofessional if I wasn't told to be expecting a call regarding the job within a few days.