Amazon Business Analyst interview questions

I received the invitation for the first interview at the beginning of February. I have been interviewed 5 times in 1,5 months (including the loop phase). It has been over 1 month but I could not hear anything from them even though I've sent two chaser emails. I don't know why would you spend almost 1 working day with a candidate and then don't even bother giving feedback. They don't even answer my emails. I don't think they follow their own leadership principles which they dig into really hard in the interviews.