Some one contacted me over phone about bonus on my policy which was expired two years back and asked to send me some identification documents and two cheques one for Rs. 16000/- towards security and another cancelled cheque with the promise that I will get the bonus amount and security of Rs. 16000/- refunded within 10 days. Now, after 15 days I have not received any money and the cheque is also credited from my account. What can I do.