Want to cancel Reliance Life Insurance company Ltd. policy ?

I want to cancel my Reliance Life Insurance policy bcoz the agent's given detail are totally different from the company about this policy. I have already give the cancellation application to the main branch but he can not accept and also can not give me any help or advise that what will i do for cancel this policy. also Reliance provide me all document after 1 month and 17 days of commencement date of my policy. I also send mail to reliance
but i didn't receive any answer from there.

In my application I have mentioned the following reason :

My Policy is commencement on 12th april 2011. But I can not get any document since 12 may.

After Daily Telephonic called to Reliance Representative that she told me we don't find any status
of your document. So she told me that we send your document again by courier After 19th may.

So, I got Policy document by courier of DTDC Date on 4 June, 2011.

When I read all document then I found that policy is not same which details give me by reliance agent. It is totally different.