Toshiba — product not working, seller deny to help

Address:

Surat, Gujarat

I bought toshiba suruga pen drive of 16gb capacity on 27/03/2014 from online shopping from TRADUS.IN site. Suddenly it got corrupted & it's storage capacity reduced from 16gb to 4mb only. I contacted seller, but they deny to help. there is also no any service center in my city. please help.
my mail id is nitin.j.[protected]@gmail.com
mobile num is [protected].