Pole Star Java Developer interview questions

They were looking very interested with my cv. They had already moved further with other candidates however they wanted me to give it a go according to the recruiter agent. Asked for some parking code test which I have done the same at uni. Using similar solution with university and adding two extra solutions into my files explaining which way is more efficient. They replied back with a "other candidates did better solution" and that was it!! I keep asking the agent for feedback a month later but they never come back. This is the worst process I went through. Basically I wasted my Saturday, at least if I was getting a feedback it would give me an idea what do I need to improve.