You can post this accusation on the Scam Accusations board. And doing that, post it with the format that you can find on the pinned post on that section. But for you to get to see it quickly, here it is:
Scam Report Format[b][color=black]What happened:: [/color][/b]
[b][color=black]Scammers Profile Link: [/color][/b]
[b][color=black]Reference Link: [/color][/b]
[b][color=black]Amount Scammed: [/color][/b]
[b][color=black]Payment Method: [/color][/b]
[b][color=black]Proof of Payment: [/color][/b]
[b][color=black]PM/Chat Logs: [/color][/b]
[b][color=black]Additional Notes: [/color][/b]
Copy and paste it in new thread then fill all data.