Club Factory — cancel my order please I ordered it by accident

I want to cancel my order. My order number: SO43916515. I ordered a wrist watch on 31st august 2018 with cash on delivery. The total price of the item including the shipping charges was rupees 302 but when i picked up the confirmation call they said that the amount to be paid on delivery is rupees 5000 something. The price of the watch was claimed to be rs 378 and delivery and shipping charges of over 4949. This is blatant fraud and therefore i dont want anything to do with it anymore. My order hasnt even been shipped yet. I want to cancel my order right now.