DraftKings Software Development Engineer interview questions

I did my onsite interview in December of 2018 in Boston, MA. First I had a coding challenge interview that involved validating a fantasy lineup given certain rules. It was not too difficult. Then I had an open-ended design challenge with another interviewer. There was no coding involved, just drawing up my thoughts on a solution for the challenge on a whiteboard. This was also not too difficult. Finally, I had an interview with someone of a higher status in the company, who asked me about my past projects. Overall, I thought the interview went fairly well. However, I got an email from my recruiter asking if I had time that week to discuss my feedback. This email made me feel like I did not get the job. I replied back several times and never received either a phone call or a response. I am still incredibly frustrated to have been treated this way. Avoid this company like the plague. I can not believe the level of unprofessionalism I have faced.