Mortara Instrument interview questions

After applying online, one of the manager sent an email for a technical screen. After 3 weeks same manager sent an email saying that his manager wants to take one more technical screen, saying it would be a 1:1, but actual call was a group:1. I did my best in the interview. I kept sending emails to the person who contacted me for the interview, but he never replied. 3 weeks later I called him for not sending the response, then he said management changed the direction. They didn't care to send a formal email to the candidate. I hope this helps someone, to not to waste their valuable time.