ShopClues.com — offer received for winning a car in lucky draw of tata motors via shopclues

Address:	Gurgaon, Haryana, 400602
Website:	www.shopclues.com

I have received an message to my mobile number stating that i have become a winner in shopclues lucky draw through tata motors. I have won the 1st prize which is an tata alto car. I was given an option either to get the car or will get rs. 4.50 lakhs in cash.
They told me to pay rs. 6600/- as registration charges. I was told in case if i am not okay they shall refund the registration charges. Once this was done i immediately have received an call asking to pay around rs. 19000/ as charges towards income tax payment.
I was told that there is a person named mr. Amit raj who is the md of this company. However from his tone he seemed to be an bihari with not to proper english.
I am now confused was there any lucky draw from this company. I have been receiving calls from certain mobile numbers and have now asked them to process a refund for the registration charges back to my bank account.
They are now behind me telling all papers are processed and make the payment towards income tax. I am feeling this is a fraud.