DataVisor Software Development Test Engineer interview questions

Very bad experience . I applied online and was contacted by the recruiter. 30 min telephonic was arranged and 2 coding questions were asked. I answered both the questions well and the interviewer told me I did well and asked for 2nd telephonic. I gave that too .2 coding questions were asked and I did both with the most efficient solution and I was told I did excellent and was told to wait for good response. Then after 2 weeks of wait they mailed me saying they found better candidate and that I am not fit for the role and that they will not help me with any other feedback. I do not know what I did wrong or where was my mistake, neither I know the criteria of a better candidate when you said I did excellent. It is like harassing the students unnecessary . I was not expecting this from DataVisor after seeing the rating and reviews on Glassdoor. Seems all these are fake , the way they have treated me.