Raft Machine Learning Engineer interview questions

Really worst experience I got the first mail for interview with HR round then I gave her the basic introduction about myself and then she gave me one assignment to work over related to Fashion MNSIT api building and using celery i have asked them about my progress several times over the mail they jusy ghosted me and after one month i got the rejection mail without any reason.

-Initial Screen -Take home assignement , NLP classification + Entity linking/normalization, WITHOUT A DATA SET which was very weird to me , still tried and send them my solution, and never heard from them again ( ghosted)