The fact alone that you first accuse RM of hacking you, followed by saying how the guy said it was someone on our forum, who has never posted or been active for months hacked you says it all.
First and lastly, by saying that "The guy said it was posted on some form , his name was izde" you acknowledge that it wasn't Runemate that hacked you, but rather someone else.
Next time enable 2FA, have a different password for different websites/apps/logins, don't share you info with anyone, don't download anything you aren't familiar with or that doesn't have a reason for you to trust it
Sucks you got hacked, but I highly doubt it was RM, sorry for being an asshole w/ my previous reply