Core Strengths interview questions

After an insightful chat with the recruiter, I had the opportunity to try Core Strengths assessment myself. Upon completion of this, I was put through to the CRO for a 60 minute second interview where we discussed my experience and the role in more detail. Afterwards I was told that he was happy to move the process forward and would like to connect me with the CEO for another 60 minute interview. In this interview step we talked more about the responsibilities and at the end I was told that as a final step they would connect me to a product specialist and give me the opportunity to ask questions. After 5 days of waiting I decided to ask for an update but I got simply ghosted and never got an answer till today. It's ok for me to get a rejection but after talking to the C-levels for over 2 hours and getting told everything is good, I find that extremely disrespectful and unprofessional. A simple e-mail would have done it.