Carphone Warehouse — Fraud against order through Quirk

I saw an ad on Quirk for a Google Pixel phone and contacted the seller who is listed as Akilklein. After contacting the supplier, he mentioned his name as Chris and asked me to pay shipment charges of Rs. 5, 000 for the product. He mentioned that the rest of the amount will have to be paid on delivery. When I did the payment, he mentioned that another Rs. 10, 000 had to be paid for VAT and Tax fee. I refused to pay that amount and asked him to cancel the order. He has refused to refund the amount and said that the courier had already been shipped even though all this happened in an hour's time.