Syncroness Presentation/Technical Writer interview questions

I was called on Dec. 5, 2018 after applying, but I did not receive notice beforehand that I would be contacted for what was essentially a preliminary phone interview. The person I spoke with was amiable and responsive to my questions. I was asked to send my portfolio for review, which I did the same day. Dec. 6, I was contacted by the same individual and told the hiring manager liked my portfolio, and I was asked to create a technical PowerPoint presentation from scratch on any topic involving an aerospace, medical device, or robotic field. This was requested on a Thursday (Dec. 6) with a due date of Monday (Dec. 10) at the latest. I created a presentation and sent it Friday (Dec. 7). I received an email asking a question about the presentation that same day to which I likewise responded on the same day. Despite my efforts on December 11 and again on January 2 to email the individual who originally contacted me, I received no response and was, what felt like to me, essentially ghosted. If you are going to ask people applying to create projects to be considered for a position, please let them know the outcome of their efforts whether positive or negative. This shows professionalism toward and respect for those individuals who create the projects you request in order to be considered for an interview. Leaving people hanging and not responding in any way to their emails (especially after telling them to contact you with questions) portrays an image that you do not value these peoples’ time, and it also raises a red flag as to how your actual employees may possibly be treated.