Colonnade Insurance interview questions

First round with recruiter, including PowerBI knowledge check. Stated I do not work with the tool, but was happy to take them. After this I was given a case study, to plan estmation and creation of a new dashboard. After sending that back, and one additional week I got the response they did not like the responses I gave to the questions on the first round. Don't get why I was asked for the case study. Haven't met the employer..