I purchased my sofa last month and I never applied a protective coating/seal before this happened:







The dye was transferred from my cousin's blue sweater last night:




I tried removing the stain with the cleaning kits I received with my sofa but they had absolutely no effect.



I also searched the net for a solution but I wasn't comfortable trying these suggested options (windex, hair spray, etc.), so now I'm here.

What can I do to remove this stain?