Capgemini Engineering Junior Java Developer interview questions

First video meeting with hr. Basically you talk about your experience and then they send you a online exercise to evaluate your knowledge. So far so good, but when was to schedule a call with manager, I missed the call because I was busy and I wasn't able to retrieve the call cause the number was anonymous... I tried to get in touch with hr but never get any response... In retrospective its very bad this kind of behavior for the company with such good rating...