Ericsson Senior Data Scientist/Machine Learning Engineer interview questions

The process started with a first interview for general presentation of the company and of myself, then 2 technical interviews and then 2 upper management interviews. After 5 interviews I never heard anything from them. I tried to reach out by writing few emails asking for the result or a feedback, they never replied. The impression I got is that they do not care at all about the candidate and do not think they have any obligation like providing an answer and a feedback for a candidate who committed to 5 interviews in 2 weeks.