[Resolved]  ShopClues.com — fraud postage received on its name

My dad had received a post saying that it's from shopclues.com, that he had won 1lakh lottery+scratch card. It also says not to call the customercare helpline number but had provided with some other number to contact [protected]. The address which it came from says (NALINI RANJAN AVENUE, BASANTALLA SAHA ROAD, NEW ALIPORE, KOLKATA 700053). It says to enter our acc number, contact number, IFSC code, bank acc holder name and bank name. the way the pamphlet looked, the address and everything appeared fake to me right in the first instance. please look into this issue asap so that no one falls into this trap.
my only concern was how the fraudsters were able to get the details of my dad and our address, despite the privacy rules that are in place.