100Bestbuy.com — camera fraud

I saw a camera ad on quikr. After that i had send that person my whatsapp number then we talked and i placed order for that camera but he played a game he told me that by mistake there is 7 units are coming instead of 1 and said that he paid 40000 rs. For the remaining cameras and i have to pay remaining 20000 rs. But i regret it i told i don't have such so i paid 6000 rs. After then he again asked me for insurance fees then custom fees in such way i have paid him 35000 rs. Approx so i don't know what i will do now if any help i can get i will be very thankful for them.