HDFC Bank — Experience Letter not providing

Address: Chennai

Hi, My name is Kavitha g.. I had worked in HDFC as Sales Executive from May 2006 to December 2006, Emp Code CK01790 and Senior Sales Executive from January 2007 to March 2008 Emp Code CK03226. And I got the resignation acceptance letter also..but I need my experience letter for my current employment.I have been sending mail to HDFC to issue my experience certificate for past few days.they don’t even respond my mail.kindly help to get on the same.Thank you