Revolut Digital Marketing Manager interview questions

Please provide feedback, especially to those that have dedicated so much of their time and made it to the last stage. I went through over 7 different stages, spent at least 10 hours in total preparing, completing the task and on interview calls, made it to the very end and then got a simple rejection letter with no context as to why I got rejected. It is a great shame that not even the most basic of feedback can be provided, but instead, a generic rejection email. So much for the Be radically honest, direct, and respectful value... I am also incredibly annoyed as the recruiter's last email alluded to me being successful and that our next conversation would be on starting date and compensation...so very shocked to see another email that said I was unsuccessful. I, of course, tried to follow up, but complete silence. Process: Stage 1 - Screener interview (30min) Stage 2- Interview with a manager (30min) Stage 3- Task (5+ hours of prep) Stage 4 - Pre-call prep with a recruiter (30min) Stage 5 - Problem-solving interview - (45min) Tip: make sure to learn the provided framework and use it! 
Stage 6 - Pre-call prep with a recruiter (30min) Stage 7 - Bar Raiser - (60min) Tip: make sure to learn the Revolut values Stage 8 - Team fit call (30min) I got my rejection after stage 8 with no feedback at all… 10-15 hours in total of prep, calls, and tasks. 

 Final note - please please provide feedback to your candidates.