Bamboo Rose Software Engineer - Java Developer interview questions

I interviewed in 2018 at Bamboo Rose, and it was in-person interview at their office. I spent over half a day for the process. There were a couple of aptitude and MCQ tests after which we broke for lunch. After lunch, I had a round of a technical interview. The interview went well. The interviewer got an answer wrong but kept insisting I was wrong. On going back home, I ran the solution on IDE and indeed the interviewer was wrong. I was told my profile is more suitable for a Data Engineer over Java Developer but we will get back with the result. I never heard back. I contacted the HRs twice and each time I was told they will get back but they never got back. I invested my time and money (for the commute; the office was quite far from my place). The least they could do is get back with the result. It was an exhausting and a disappointing experience.