Native Instruments Software Engineer PHP (f/m/x) interview questions

After one single video call I was given a highly undescriptive coding challenge. After delivering the coding challenge I received an automated email saying it was decided not to take my application any further. On the email it stated what I did wrong on my coding challenge which was not accurate at all, it felt like the review I received was from someone else's coding challenge. I wrote an email back asking if they did a mistake and it was the best of courtesy to schedule a video call as I took my own time to do their coding challenge. They never replied back my email.