Amazon Senior Program Manager interview questions

Contacted by a recruiter and sent an assessment. Completed assessment and recruiter advised I would be moved forward to schedule an interview with the hiring manager. Once the interview was scheduled the recruiter said I would receive prep materials and guidance from her, I never received prep materials despite reaching out multiple times before my scheduled interview. Interview with HM was actually a phone screen and it was clear that without the prep materials it would be difficult to be successful. Was told by HM I would hear back from recruiter in 2 business days regarding next steps- despite follow up again with the recruiter, I was completely ghosted.