A lot of the cheaper or non-virgin hair extensions go through extra processing so that it can hold the brown/black dye well, which makes it hard to recolor. You can try a protein-fiber fabric dye like Jacquard Acid Dye (its not dangerous like it sounds). I’ve seen it at craft stores and online for super cheap. But, considering it did take some of the color, you may be fine just trying it again, next time leaving the color in much longer and washing with warm water.
BTWs the silver blue sounds really pretty! I’m super jealous of your accident ^_^