Well I think Ryo called you scammer because he got you parts while you where in his crew, then when you got them and you left he called you a scammer for that.
Has I told you, the way to clean your name is give them back, but once he let you use them for longer and you have time to get a set by yourself I think he can stop telling that about you, because you like many others have a bad reputation because of situations like these ... and that sux, because people don't know in who to believe.