Cancel your policy, if you have one with them, or don't buy one from them, encourage others to do so, as well. It's a free (somewhat for now) country. Other than that there is nothing you can do, unless you want to go the statist route, and have the government dictate to them that they HAVE to offer insurance to new homes in high risk area.
They have the right to choose what business they want to offer, and a responsibility to thier share holders, in order to make a profit.
Not insuring high risk properties lowers rates for those who aren't high risk. It is as simple as that.
I agree they have a right to carry who they choose but the public has a right to change carriers. If they don't want the new owners, the other companies may follow suit. Saying well this doesn't affect me so I don't care, is just letting a foot in the door IMO. No, I don't want the government involved but they already are. We can't get flood insurance anywhere else. Is hurricane insurance next?
Very true. Companies are in business to make money.
When we lived on the Easter Shore of Virginia we had to buy special flood insurance from the government because no policy covered hurricane flooding.