HARMAN interview questions

Interview was scheduled at 10.00 AM .I was shocked to see more than 50 people came to an interview . They had only 2 interview panel . They didnt even provide the lunch or there was no facility to have lunch in their campus . After waiting for 7 hours my turn came up . They did only 1 round for each candidate . Interview was average . After 3 days sent a follow up email. But didn't receive any response . Pathetic interview process .They just wasted my whole day .