AKUNA CAPITAL Software Developer interview questions

Got a hackerrank challenge to solve a question in c++ in 3 days time. I spent lot of time to solve it. Was able to pass all tests. But I got reject saying my experience does not match their experience. Although it is a junior role. My issue is they should not have asked me to take the test if my experience does not match since this challenge was a project not a 1 hour leetcode type of question.