BiteSpeed Software Engineer interview questions

Applied via wellfound. They want the applicants to do the task before applying and apply with the link to the task. I did all the work and applied. First they told me that the project has some errors and I need to fix it. I had a look and even tested everything but it was all working fine. I got back to them and now they started ghosting me. No rejection emails, nothing. Their average replying time is 6-8 days. The entire process is so frustrating. I took the time to the assignment and it was good for nothing. Very unprofessional behaviour.