First Flight Couriers — courier been delivered to unknown person

Its a complaint against mr. Karthik cell no.[protected] has been lying for my courier delivery n also hv handed over my courier to someone else without prior information. Courier was been despatched on 30th march n is delivered today on 2nd april n he is saying that he's been calling me past 4 days regarding the same but cud not contact s my phn was switched off. His 1st lie n now i was waiting for him past half an hr for the courier at the landmark given by me but he didnt turn up n after 5 mins he again gave a missed call saying he delivered the courier to the shopkeeper near the complex 1 hr back. I dont understand y he has to say such kind of things n on top of that he's arguing for the same. I dont know y reputed services like yours hv this kind of services. If at all my courier containing important documents wud hv been misplaced then who wud hv been responsible n y did he handover to unknown ppl. Very much disappointed by ur service n henceforth i need to thinkover to continue with.