Unfortunately, “bleeders” as they are known in the industry can be very challenging. Some of them will eventually stop bleeding with repeated cleanings, but most will just continue to bleed and bleed. You could try using a dye fixative (see step 5 above), but its probably time to let the experts take a look at it. I recommend taking the dress to your favorite dry cleaner. Tell them everything that you have done to it so far. Don’t expect miracles, but they may be able to save your dress. Good luck!