Tigerlab interview questions

Only managed to be interviewed in the first round with HR. They gave me a take home assessment. I did the take home assignment and submitted to them. Got totally ghosted. They didn't even reply an email to acknowledge the submission of the assignment. What is worse is that the take home assignment they gave me got bugs and I had to spent extra hours wondering what went wrong with my solution.

Was disappointed because after passing the first round of the Interview I was supposed to be interviewed by the HOD but at the final moment they sent someone junior instead to just to get it over with. They could have just told me outright that I was not selected instead of wasting time.