Visa Inc. Software Development Engineer In Test interview questions

Was contacted by recruiter for VISA talent event in Austin in June'19. Cleared hackerrank challenge and another technical round. Was invited onsite where had 4 rounds each lasting 45 mins. The interviews were pretty decent and was expecting an offer since there were 8 positions with new security group. Was told to expect a communication within couple days. Guess what- haven't back since then. All emails and calls went unanswered. Can't understand when ghosting candidates has become a norm. I'd at least expect thanks 4 interest email if rejected or if the positions were scrapped. EXTREMELY DISMAL EXPERIENCE!!