Cubbit Tech Manager interview questions

Initial Call was set up with the HR Manager, they asked all the basic questions and gave a brief about Cubbit. And told we will schedule others rounds of interviews with Tech team members, but no interview was scheduled. I had followed up with the HR by sending follow up mails, 3 times in a span of 3 Weeks and there was no acknowledgement to the same. Feedback to the Hiring Team: Atleast have the courtesy to acknowledge mails or if you are not interested in the candidate then send them a rejection mail atleast.