In your place, I would ask for a refund.
To restore it, you'd need a real chain or a very good repro and good luck on that. It is almost impossible to find a real one and all the good repros are being sold as real ones
The grip could be rebuilt but would still be a rebuilt grip and identifiable as such. The scabbard fitting might be rebuilt but refinishing the scabbard surface is very difficult to do.
In the end, you'd spend more without increasing the value.
Dave
