[Resolved]  Aviva — Premium Receipt not received

I have submitted my annual premium receipt of Rs.10, 000/- to Aviva in the month of March 2008. The same has been debited to my a/c on the due date and is confirmrd by the Aviva on mail. I am regularly asking for the receipt since then but they are just making false excuses and not paying any heed to request. I am in regular contact through e-mail to their customer-support cell but they are giving me sterotyped replies that they have send the receipt by courier Blaze flash. They also claimed that the said receipt has been delivered to me on 7th may, 2008. But after complaining them the not receipt of the same they are just lingering on the case. Kindly suggest the remedy.