CRH Analyst interview questions

1st is Skype interview in the first week. 2nd is f2f interview one week later. It took one month for them to get back to me after the first f-2-f interview. Then in the 6th week I attended the 3rd interview. Within the same week, I attended the 4th round interview doing case studies, then I was informed that I was the one hired, but the date to make an offer to me is endlessly prolonged. It took so long to wait even though the recruiter was very nice and professional. In the end I got no offer in paper, despite being notified that I am the one hired!