hanging of hard disk

my hard disk not working that purchase at the date -

which s/n 9VM3JY9M
ST3250318AS

P/N 9SL131-301
DATE CODE : 10077
SITE CODE : TK

STX- 720012(B)

i am satyendera sharma submitted my hard disk to my nearest samsung customer service center but yet i not recieved my new hard disk my hard disk have the warrenty up to 2010
so kindly help me
my work order no. is - 8a11w228
center address- samsung india electronics pvt. ltd.
r-9/185-raj nagar ghaziabad
ph-01202823624