Amazon sr vendor manager interview questions

I had to go through a phone interview and then I was invited to the Amazon offices, where I had to go through 5 additional interviews with different people from different teams. They asked me about specific situations from my past experience

8 weeks from submitting application to find out if I even had an interview. Had pretty much forgotten about it. Had 2 phone interviews, then was invited for an assessment day. The process was really weird for a product related role. I understand the importance of their principles, but it becomes nothing to do with the job after 2 hours of phone interviews. They cannot assess product, brand, trends, customer knowledge with these questions. The first interviewer admitted they had been looking for a while- I am not surprised!! The recruitment contact wasn't helpful at all- I asked a couple of simple questions before my 2nd interview and never got any replies. Pretty rude as I had invested a lot of time myself. Then when I was asked to come in to meet with Amazon I said that I had accepted a role elsewhere (it was a full day off needed, with 3-4 interviews I was told)- I then really politely explained that I didn't feel the questions asked so far were creative/ fashion/ trend related at all (They didn't even ask me what trends were key, what brands I like or anything), and that the role wasn't what was really being advertised. They wanted someone who had done design/ buying/ merchandising/ trend/ multi product/ branded/ own brand/ product development/ manufacturing.... then asked for a 2 page business plan as if I were launching a brand. It was about 6 roles in one. Hence they've had the vacancy for months. Shame they never replied, hopefully they might take it on board.