Help required!

I have a valid group medical insurance policy (of United India Insurance)for year 2010 provided by my employer through Mumbai, India TPA Paramount Health Services Pvt.Ltd. and Vantage Insurance Brokers Pvt. Ltd.

Recently, M/s Vantage had sent an email in June 2010 to our employer stating that "As per the new circular issued by the United India following changes are have been made:
1) Claims must be intimated within 24 hours from the date of Hospitalization.

2) Claims must be submitted within 15 days from the date of Discharge."

I had submitted my reimbursement claim in Aug 2010 to TPA for my hospitalisation due to Malaria disease. Notice was not given to TPA within 24 hours from the date of my Hospitalization (as cashless facility was not availed). However, claim was submitted within 15 days from the date of Discharge. (with all originals documentation as required)

Now my reimbursement claim of Rs. 16881/- is repudiated by TPA for non compliance of 24 hrs notice.

Could you please clarify, if TPA can repudiate whole claim only due to this reason?

Is there any way to ensure processing of my claim and getting payment which i had already expended?

Thanks in advance for your help.