Tragic display of a disorganized, ineffective HR department. Don't answer questions, don't reply to queries, don't respond to follow ups. Even after invitation. This lackadaisical approach to potential employees, senior candidates is nothing short of a disgrace.
From the point of application to the black abyss I was never at any point particularly impressed by the way they handled the process. In short, if your HR is so bad you repel good people at the door, (not by your own accord, but by the candidates) I can not imagine what it must be to actually work in such an organization. I don't hold high hopes!