Elsevier Human Resources Generalist interview questions

I did not apply for the role, however a Recruiter from London reached out on 12th of March, 2020 via LinkedIn. I was pleasantly surprised by the approach and professionalism of the email. I shared my CV the same day and confirmed I would like to have a chat and know more. I got an answer on 17th of March (by that time I was sure I will never hear back) asking for a phone discussion on the 18th. I confirmed right away that I am available. On the 18th at 1 PM I never got any phone call, although the recruiter was online on LinkedIn the whole day. I followed up 30 minutes later with a message saying I am available all day and I am looking forward for the call once she gets free. 48 hours later, I did not get any reply. I am not writing this to complain or cause trouble for anyone, however I invested good few hours in researching the company and I noticed someone takes the time to reply each and every Glassdoor review, which is an admirable practice. However, the company won't be able to attract the people and best practices they are aiming for unless there are some basic expectations made clear for all levels, especially when it comes to candidate/employee experience.