New Relic Full Stack Developer interview questions

Brief phone screen with recruiter followed by video interview and code challenge. I completed the code challenge and sent it in as per instructions. No response. Followed up several days later to find out if I was still under consideration because I had another offer and they told me that they hadn't received my code challenge. Then, they told me they would get back to me but again received no response. I was surprised at this level of unprofessionalism, particularly because I'd taken the time to do a code challenge. Also, the code challenge appeared hastily written and confusingly worded.