MoBagel Machine Learning Algorithm Engineer interview questions

I had very bad experience interviewing in this company. Got a message from hr asking me to pass the coding challenge on HackerRank. After that, I got an invitation to online interview with Team lead. Got one medium LeetCode question on this interview. In the end I asked what to expect next. Team Lead said that hr will contact to me. However, next two weeks I got no reply from hr. I messaged her once. Still no reply. I even called to ther office, and the guy who picked up the phone call said that hr will message me very soon. But still no reply. I don't like treating candidates like that. Very unprofessional!