OP if are having the shipment tracking number, just check its status on this site
Leopards Courier
in case step 1 was not fruitful your second step will be to visit your nearest leopard's office and inquire if they receive any shipment on your name and then where it was delivered, they will tell you name of person and his cnic number in case it was delivered which I really doubt. Alternatively you can take the delivery guy with you and bring him to your place so that let him tell you exactly the house where he delivered the shipment incase it was dispatched at all by the seller.
Good luck!
PS don't worry unlike the prev case this case is very simple and you just need to get verification from leopard guys and getting a response in negative from them will make you all set to blame the seller as Fraud.