From what I can see of the leaves in your photo, the plant looks like there might be insect infestation. If that's not the case, there are some good videos on YouTube on how to repot a long-necked violet. Even if it's savable, it will be months if not longer before you'd have a healthy, blooming plant again. Frankly, if this were mine, it would go into the compost pile and I'd start again.

Thank you.