You should post all your evidence and screenshots that you indeed lost that amount if you have your proof you can go to the reputation where they are trying to resolve all issues, and you should also try to resolve your issues of asking for a loan without collateral.
No need for that their BTCtalk account here already has lots of negative flags.
Look
https://bitcointalk.org/index.php?action=trust;u=2509426;page=aflags;offset=0@p2pb2b trying to improve his reputation here and resolve all scam accusations. It will be fine if we know status of this case.