IBNQ Senior Backend Developer - .NET interview questions

I was invited to a coding test on codesignal and did it well (accordingly to the platform). Solving took 70 minutes, plus I spent some time in advance to get familiar with this site, so we are talking about 2+ hours of my time. No response from the company. I sent a nice follow-up email. Again, no response. In the end, I didn't received even a simple rejection email, not to mention some feedback.