hard disk replacement

Location/place: mumbai

Name of company/service: western digital

i submited my faulty 500GB western digital hard disk to their service centre on 17th april 2012, but till now i`m not getting my harddisk back and there is no responce fron their side also.please help me. my name is vikrant more, ph no is +91-9867469006 and my e-mail id is [email protected]