Vendor scam

I got scammed by a company PC secure in Ambattur, Chennai. The person had contacted thru whatsapp and sent me msgs on products and price. We were facing a shortage of CCTV materials so ended up trusting this fraud company. Had verified their GST details online and took a proforma invoice (estimate with GST details furnished of both parties) and then did the full payment. After the payment was done the vendor responded for 1-2 days saying he is arranging and will dispatch. There after he has blocked my msgs and he is not responding calls. Unfortunately we get conned by such frauds as we do not have a strong, reliable and empathetic police and legal network. The scammers know they can get away with such frauds. More details can be furnished if there is any action.