My Ivory Prada Vernice Crystal and Stud Pyramid Tote Bag has been used roughly two times - I have it on display in my closet. (Note to self: USE the bags!). A few days ago I noticed that it had turned an unfortunate shade of yellow - and there are a few darker horizontal "lines" running through it here and there. I'm very upset about this as it's an expensive bag and this should not have happened. There's no fraying, or stains, or dirt, or anything - because I've used it twice, but I bought an ivory bag - not yellow. Two questions; 1) Has anyone been able to get this issue reversed and restored back to ivory; and 2) Does anyone recommend an exceptional, tried and true, luxury handbag restorer that can, at the very least, re-dye it to black or pink if it can not be restored? I would imagine it would be time consuming with the studs and crystals - but can it be done? Thank you for your time.