You're claiming that the victims were talking to an imposter of yours, but in the scam report, you never mentioned that.
You should read your own posts in that thread because it seems like you are the one who is doing the actions.
Here's the other report: http://www.mpgh.net/forum/showthread.php?t=1107705
Also, why are you making a dispute now when your current account was made in September, 2016?
Are you trying to evade the refund because both the users are now banned due to scamming/ban evasion?
Your excuse doesn't add up.