wundertax interview questions

The first interview went well with their recruiter. Then they sent me a task to be completed in 2.5 hours. I did it since it was not hard and put alot of efforts to be a clean code and task and completed all the requirements. Next week they sent a email that said we proceeded with other candidate with no feedback and no respect for my efforts. I also asked my senior friend to review my task and he said it was clean and working fine. Shame on them and their engineers.