Elaine, I feel your pain. I bought (online) some Kaufman Kona red and prewashed with a color catcher. The color catcher turned pink so I figured I would just wash the fabric a second time. You guessed it, still pink.
Now, I'm going to try salt and white vinegar. Hope it works.
(But, actually I'm just glad I didn't start the quilt only to have it bleed all over when finished.)