NHS interview questions

Applied online through the NHS website and was told a week later I had been selected for a group assessment. Group assessment consisted of completing a paper with a set of questions concerning cancer waiting times. The manager marked my paper and told me then and there in front of the other candidates I had been selected for an interview - further information regarding time and location would then be emailed to me. I did not receive an email so I emailed the manager asking if they still wanted me to attend but received no reply. Complete waste of time.