US Guy Cheated 3k dollars through freelancer

One US Guy proposed a project from the freelancing website. He agreed to pay 750 dollars. He is not willing to pay the money from online. He has the option only through cheque. So, he asked one US representative for processing the cheque. Also he was asking the US representative to give the share to one more guy who has the logos and contents for the project. So, he sent a cheque with 3k dollars. Then, we have arranged a guy from US and have started processing the cheque. Our representative was not able to send much money through online due to some reason. We informed him about that, then he said the project was handovered some other person, so please refund the money. We have refunded him back during the cheque was in processing state. Finally, the bank sent us a post mail saying that the cheque is a fake one. So, the bank not credited any money to the account. Here is the US guy phone number who cheated us. +1 (508) 377-3398 +1 (561) 221-2954 Please help us to find this guy and get the money back to me. Because this should not happen again to other people.