Hey Sandip,
Firstly,
If the tax deducted at source are not reflected in the TDS certificate, u need to bring the same into the notice of your deductor insurer.
Secondly, for speedy action u may also give them the details of payment received and break-up of deduction made by them against the respective payments.
Thirdly, if they fail to issue u the certificates then there may be a possibility of error in their system or accounts department failure in forwarding the amount deducted from your account to IT department.
In all the above cases, u need to obtain the TDS cert. and submit the return for LFY within 31st July 2009 without which u are not entitled to get refund of the deducted amount.
further, if ur insurer is not responding to your request u may have to bring 2 their notice that u would be approaching TDS Assesment Collector and appraising him with the issue for necessary action by their department against such irresponsible insurer.
Now u have to decide whether u would like to follow this path or otherwises.
hope ur issue is dealth with
IBS