Sherpany Senior Python/Django Engineering interview questions

Before any interview they sent a homework task for building an events-participation API, it is at the level of a good junior developer. Next was an HR interview. After doing the task, they emailed me saying I performed very well (which is really expected for anyone at a senior level given how easy the task was). Then in the HR call went really well (or at least that's how it seemed), during which, I asked if they would provide me with feedback, to which I was told that I definitely would get feedback if I am rejected. Two days letter, rejection email with no feedback, I emailed back asking for feedback, no response. After putting in time for a task and an HR call, they are too lazy to send a simple email with feedback!