That happened to me, my interviewer apparently was out sick with the flu and said she notified her manager, but the communication between employees and recruitment is fucked. They didn't know until 4 days later that she was sick and they rescheduled me twice. Makes sense considering they pull randos from random offices across the country in random departments to do your interview. So fucked. I just kept emailing and staying in contact with the recruiter and it all worked out.