UNIPAY2U — refused to give me my password

I invested RS 19000/- on Unipay2u for purchasing online gold. But the amount in invoice was only Rs 16500/-. More over the agent refused to give me my password by which I can loginto my a/c to check its status. I imediately contacted the administrator and got my password. Later on after a few days I got a call from [protected] (an employee o[censored]nipay2u Guwahati branch) asking me for my password as there was some kind of dispuit like someone else's amount got transfered into my a/c. They blamed me that I did that. HOW CAN I DO THAT WITHOUT KNOWING HIS/HER ID-PASSWORD.
I was forced to give him my password as he threatened to block my entire invested amount. Later on when i tried to login to my a/c, it says invalid password. He changed my password and took away my money.
Unipay2u is responsible for all such frauds. The employee gets access to clients acounts and misuses the account.
PLEASE TAKE NECESSARY LEGAL ACTION UPON SUCH COMPANIES..who gives false hopes and robs others money.