Deliveroo Senior Software Engineer interview questions

I passed online Hackerrank test then they arrange next stages for peer coding and System design. Peer coding ask you to read a long paragraph topic which I don’t like as they just watched you to read. And we’ve already arranged next interview but when I came to that interview on time, no body joins in the interview. After I reached out to Recruiter, they spend more than one day and told me there are some problems in the procedure and they don’t want to continue the interview. But why you don’t inform interviewee when you decide not to move to next stages and stood up interviewee. It’s my worse interview experience in my l life. Although recruiter still arrange a meeting and give feedback, I still feel not being respected.