Don't dry it! That'll set the color more than it already is.
You can try Synthropol, and/or just wash, wash, wash, wash, wash the piece(s) that have the bleeds and see if that helps. If the dye came loose once, there's a chance it'll do it again! Definitely try rewashing a few times before throwing it away - it can't hurt! The Retayne might have set it for good but you won't know unless you try - you might get lucky.