Robotics World scam

I've bought a camera from Robotics World in Western Cape on 22/11/2020 and they promise delivery but nothing yet. First they said that they reverse my payment on 23/11 because the delivery is a problem and after that the payment never came back because they didn't have my bank details. The one guy is Desmond on this nubmer 0218139988 and Monica Ryley on 0640830611and 0839441166. The website www.roboticsworld.co.zalook legit and I've lost R12k. How can we stop these people from stealing other people's money?