Amazon Senior Software Development Engineer interview questions

At first, I talk with a technical recruiter and everything seems to went well. Then I moved to next step, a cultural assessment with senior developers of the Cloudwatch team. It went well again, and I was supposed to receive a technical assessment to do as homework and to do a technical interview. I never received the homework, and the technical interview was scheduled wrong, again as a cultural interview (they were surprised too). Finally, the assessment come and the technical interview too. They never came back for more than a month, then they sent me a withdrawal email with wrong names on it (a clear copy paste). Terribly unprofessional.