Western Digital — Replacement of hard disk

Address:

3903/14 KANHAIYA NAGAR, TRI NAGAR, Delhi 110035

I bought "HDD 1000GB-WD"
Serial no. WCC6Y4DVA7NF on[protected].
This disk is in warranty .
Today[protected] when I came to know that my hard disk is not working properly
than I did phonecall to WD customer care no. Thay give me RMA no. 88305341
And told me to go to their replacement centre and submit their disk, I asked them twice weather the replacement centre in Nehru place is open or not, they said that it is open . When I went to Nehru Place the centre was closed and when I call them back they did not reply me properly
They did not even send the proper mail with file that they are talking about .

I request you to help me in this, and as I am a teacher my classes are totally going on computer but to crashed hard disk i am facing difficulty .
So please replace my disk fast and suggest me the proper and easy to do so.
Thankyou