Check the maps to see if you are indeed in a flood zone. The effective zone maps can be found at the FEMA site
https://msc.fema.gov/webapp/wcs/stor...ategoryDisplay
There is a link to future zones, which qualify as 1% risk. There was some talk about additional zones being defined for Moultonborough, but I haven't seen them come through yet, and the FEMA site shows nothing in our area.
Start your fight with the mortgage company by showing them the FEMA maps, marking you house location on it. If it is indeed in a flood zone, your fight will be more difficult, but someone might listen to reason.
I'm on the neck too, and at risk of flooding if we exceed the (so called) 500 year flood of 1998. Yet, I'm not in a mapped flood zone - yet. Go figure.