Tri-National interview questions

I had no real issues with the process from application through the interview. Everyone I interacted with was professional and it felt in line with what you would expect. The problem came at the end of the interview. The manager made a point to say they wanted to schedule a follow up the next week. He emphasized that open communication mattered and said I would hear back either way. After a few days, I followed up with HR and was told they would be reaching out. After that, there was no response at all. At that point, it reflects poorly on the level of professionalism at this location. A simple no would have been enough and would have shown basic respect for a candidate’s time.