After reading your thread its quite hard to know what actually happened with you or anyone else. To make a proper scam accusation you have to provide evidences against that exchange. I am not seeing any reliable information here which can prove that they are doing something that you described on your thread. If you have valid screenshots or anything else which will make the matter clear for all readers. I will suggest you to visit this section's pinned post where you will get the proper format of opening a scam accusation and edit your thread with more evidences (screenshot, sources).
Hope you gonna follow that and we will be able to get the real matter from your thread. You can use below format,
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]
Please follow this thread link to learn how to make a proper scam accusation:
Scam Report Format (Use it to make scam reports properly)