Payconiq Java Developer interview questions

I received HR interview I did it well then they submitted me the assignment. I did assignment with in a week with following technologies. Java, Spring Boot, Spring Data JPA, MYSQL, Maven, GIT, Docker, Swagger, JaCoCo for code coverage, Checkstyle, Unit Testing with 90% coverage I set Jacoco to fail if coverage is less than 90%. For an assignment where you are not sure if you will reach next step or not doing that much I thought was enough, can you guess what happened next I received an email after 3 weeks that unfortunately we will not be moving to next step based on the assignment submitted. They did not tell me the clear reasons why my assignment is lacking. I think they didn't see the efforts that I put behind the assignment I wasted my weekend for it to listen this after 3 weeks of review. I would recommend everyone not to waste the time.