online car order on whatsapp

few days ago I saw a video on facebook selling toy cars on lowest price i call the seller.He says give 50% advance later 50% at COD I send him 50 % advance later after six days i call him that where is my car and you didn't send me tracking ID. He says give your pending payment after all your car will send to your location aferthat he also tried to scam me later after six days a person called me and asking I am a manager of this company he says I will refund your payment he send me a payment request of 10K and asking me to enter your upi pin to get your payment back he also tried to scam me but this time i didn't get scammed. i says every person who read my this experience don't buy goods from whatsapp,by facebook video, facebook advertise , unknown wibesite. THANK You