Shoppers Stop / First Flight — Document not received

Address: North West Delhi, Delhi

I left the job from shoppers stop on 3rd july 2012 and our HR promised me she would grant me my relieving letter after 2 months(3rd sept. 2012). I asked her for my relieving letter on after 20th sept. 2012 she promised me again she would send my document after 3-4 days. Again, when I had not got my document I called her and she was telling that she had sent it through first flight courier service and gave me consignment number. I asked courier office for my courier, they told me it was received through Punit(I don't know who is punit). I asked all around my colony that who is punit but there was no punit. I am still waiting for my letter. I don't know who is responsible for this problem.
Name- Lokesh Jain
Employee code- 32435
shoppers stop ltd, new delhi, rohini
FIRST FLIGHT consignment number-BD0846120