WNS Global Services review: not getting relieving or experience letter

hi,
I had worked in WNS in the year 2007 to 2009 at Wns global services Pune. I could not continue further because of personal issues. They gave me my PF but I could not collect my relieving letter and experience letter. My name is Kamini Premkumar Joshi. Emp id is 111543. legal associate was my designation.i have asked them many times..my email is joshijanvi1007@gmail.com.thanks