seagate harddisk — bad service of seagate

i gave my harddisk with a call id SGTAND[protected]DW in seagate service centre, since one month over i didnt got any message from them .They dont pick up up the phones of the consumer . can any one help me plz .once i went their for confirmation they told me that with in one week they will send me a message of replacement of my harddisk but three weeks over i didnt got any message.

please help me .