Rakuten Sr. Software Engineer interview questions

I have had a bad experience with Rakuten interview process. After applying to Rakuten through Linkedin, I got the email from Rakuten Asia to join in Codility test. It took me more than one hour to solve 3 problems (one easy, two medium). I noticed HR my result. They also asked me to fill up the form (including current/expected salary, bonus, schools, references...). After a few days, they send to me the next online interview. I see that there are 5 managers who will interview me :)) I took a day off to join this interview. But in the day of interviewing, I waited 5-10min, still, no one comes. Then HR contacted me and said interview managers had to troubleshoot the issue and will change to another day. However, after 2 weeks, I haven't received any email from HR :( I think they don't respect candidates, so I decided to get an offer from another company. Should forget Rakuten.

1st round Hacker Earth with 3 java program, which I feel is easy. 2nd round was F2F and it was bit challenging . The main focus on DS and Algos.