Clark (Germany) interview questions

The interview process was so weird. In the very first screening round I was expecting HR but it was technical for 15mins. I was told I will be given assignment if I clear this round. I was told I will be getting the update by end of the week. But I received the assignment email on the same day which missed. But I finished the assignment within given deadline and submitted. I was told I will be getting update soon. I followed after 1 week. They said I will get an update in 2 days. I am trying to follow up since 2 weeks, no response. This is very unprofessional to ghost the candidate. I spent whole 2 days to complete the assignment. At least I expect some feedback. It is very disappointing. Never attending interview for this company again.