Deloitte Manager interview questions

Unstructured,my interviews started from May 2018 and continued till July 2018. The consultant representing me had to follow up like crazy but never got the responses on time. I had two rounds of skype interviews and a Case Study which was given to me the day I landed in Australia and without even a day's notice as the partner interviewing had to go on leave for two weeks. I was interviewed in July 10 after which I had to do multiple follow ups to get the feedback.I was finally told that I had qualified and was asked to provide professional references. While I was waiting for my offer, to my shock, the recruiter called me after a week to let me know that Deloitte is not proceeding with me. This is when I have recently migrated to Australia. Highly unprofessional attitude towards the candidates time and effort.