HDFC Bank — pf form &relieving letter

Sir,
I started my career in HBL GLOBAL PVT LTD in jan2006 employ no-P06307, i got promoted to hdfc cse by may 2006 in car od division chennai, employ no-47612, i worked till oct2008, i received all my settlements from HBL, but i did not get relieving order as well as pf settlement from HDFC, i mailed to my sm but no response, so please take some action and make me get back my hard earned money, in my career in hdfc i gave my full hard work and effort to perform, so need back my pf money, so please do the needfull.
Thanking you,
p.prabhu