Zillow Data Scientist interview questions

I interview with Zillow at its Seattle office and met a few team members. The format of the interview is very casual where we discusses cases that the team members face in their everyday work.

They sent me a dataset to work on. The dataset was about the Zillow real estate. The questions they asked were not hard. However, the HR was really unprofessional. The HR first sent me the wrong dataset. I found it out because the dataset and the questions asked were inconsistent. Also, I was confused by the wording of the questions and sent an email asking about it. It took the HR a week to respond the email. I think I have done great for the data analysis, because compared to the dataset I worked in class this one was quite easy. However, they rejected me through the system without telling me where I could improve on.