AI Collective interview questions

Applied and had a call with the HR first. It was a introduction from both sides. The recruiter was very nice and helped alot and great communication. After that they send me a task to finish in 1 week. The task actually was challenging, not easy, but not very hard either. After 2 weeks i got an email and said they liked my code and the feedback was positive. They said they will contact me for the next step and after 2 months of wait, i just got a rejection with no real feedback. I think i really deserved a feedback because i invested so much time for the interviews and the challenge but what to do.