Worldpay interview questions

I had an initial interview with a recruiter which touched on my experience and briefly explained the role and team that is recruiting. I was then invited to an assessment centre day. The activities were very typical, group exercise, case study and interview. The case study was good and was easy to understand. The group exercise was a desert island scenario and arguing for which items you think should be picked. Overall I felt this was very poorly explained leaving us all confused. The interview was the worst part and having been through many interviews it felt really odd. It felt more like I was being asked riddles than about my experience and skills. There seemed to never be a right answer or that they felt I wasn't understanding the question. Overall there was also very little testing in terms of technical knowledge which I found strange. While there were lots of great people there it honestly felt disappointing and disheartening especially having to travel all the way to London.