Flitto Local Project Manager interview questions

I was asked to finish a translation test. I was also told that they would contact about the results in two weeks. I have waited for 20 days and then contacted them to learn about that I have failed the test. I demanded a mark, any reason that shows my mistakes but no, they had nothing to provide but telling me I have failed. This is highly unprofessional in my opinion. They made me feel wasted.