I can confirm I dealt with this. The user you scammed, @ofnie12 also scammed another user as it seems https://www.mpgh.net/forum/showthread.php?t=1115049
He wasn't banned as no MPGH account could be found associated with his skype. (Screenshot below)
To get unbanned, you'll basically have to do a public giveaway here - https://www.mpgh.net/forum/756-giveaways/
You can choose what you want to give away worth the $40 value..