Hi Andrea,
It sounds as if you have filed your claim with your neighbor’s insurance company and are not pleased with the method of valuation they are using. Without having any details on the insurer, I would suggest the fastest course of action for you would be to file the claim with your homeowners or property insurance company for the damage. Your insurer will likely then subrogate (meaning go back and collect what they paid for the loss from the neighbor’s insurance company) to get their money back.
Let me know if that helps?
Karl Susman