First Flight Couriers — still in transit even after 6 days

Consignment no: f991b3681130
My courier has not yet delivered, still in transit even after 6 days, i booked courier from kundanahalli gate signal bangalore on 28th feb, before booking i asked will they able to deliver by 2nd march, after confirming i booked my courier, as it was very important to reach function on time, but now it's 6 days still no update, why did they took if thy were not sure, who ll compensate the delay?? I am fed up of tracking and calling the concern people, they tell they will look into it but no more updates.