raising the nut!
Instruments- discuss specific features, luthiers, instrument problems & questions
Even a crushed, smashed, or exploded instrument can be repaired, given time, determination, and skill enough.
It sounds like there's a hump in the fingerboard, or some frets have popped up because of humidity issues. In either event, the problem can be fixed by a reasonably competent guitar or violin repair person. The cost of the repair may be more than you think the instrument is worth. But consider the cost of repair vs the cost of a new (or new-to-you) instrument.
If the problem is either a hump or high frets and isn't too bad, the frets can be filed level, then re-shaped and polished. If it is really a camel in disguise, then the frets need to be pulled and the fretboard planed flat. Some of the fret slots may need to be re-cut before new frets are installed, leveled, shaped and polished. All of this sounds pretty drastic, but the procedures are pretty common in guitar repair.