Ada Fullstack Developer interview questions

I finished 5 interview stages in Ada and still didn't hear back anything from the HR Team, I pop up email regarding my feedback twice. But they are so irresponsible. Really bad experience and seems like very much unprofessional. I believe it's a reject, and that's okay but uninformed reject is extremely unprofessional. Interview Process 1. Phone Interview with HR 2. 2 interview with 2 different hiring Lead(ML and Fullstack) 3. Take home problem solving 4. Discussion on Take Home challenge(How can we optimize more) 5. Cross culture team interview.