Qnet — someone has breached in to my virtual account

Address:	New Delhi, Delhi, 110072
Website:	portal.vihaanmarketing.com/VirtualOffice4/onlineestore/Online_Login_Vihaan.aspx

My ir id is in 501079 and i have never shared my password with anyone and suddenly 2 days back it tried to logged in but i couldn't because someone has changed my password and also changed my registered email address.
And now i am trying to complaint and contact the customer care but nobody is giving me positive reply, they are not even entertaining me.
Customer care is continuously saying this please provide us the registered email address.
If some has breached in to my account and changed my email address so how can you expect that i can email you or confirm the new email address.
I have provided them every single documents and my last transactions which shows that i am the account holder.
I really want to raise a complaint against them. I am fed up, how can someone breach into my account, i have money in my portal, what if someone try to steal that.
I am going to sue qnet if anything happens to my money.