QxBranch Software Engineer interview questions

Initial chat with Director of Engineering. And then they gave 1 week to complete a technical task. Then 1-hour interview with 2 senior software engineers Generally speaking, this was positive experience. However, I didn't get any response when asking for feedback (3 emails), even though I got into the final round, talking to director of engineering. No response at all, not even "Sorry we can't provide feedback". Complete silence.