[Resolved]  Religare Insurance Broking Ltd — Didn't keep commitment made

Sir,
I bought two ICICI Prudential policies from Religare Insurance Broking Ltd(RIBL) on Jan-Feb 2009. At that time it was commited to me that the 15% of the first premium will be paid back as commission. The same I got from them after a great struggle. Now they are not keeping their words for the second policy. They are now providing me a cheque of lesser amount and saying that they are doing their best. Means as much they can do as they are doing any favor to me. As a matter of fact I have not received their cheque. And looking for the justice. I am having all written communication with them made regarding this issue, mentioning the 15% too. Now if its not commited then how I got the first cheque of right amount (15%). Now they are saying that the policies are different. So they are making a loss by providing 15% of the second policy. But in reality the policies are exactly same, as ICICI bank said to me.
So any body please guide me what should I do. This is not a matter of money. The issue is why I should not get my due/right.