Wells Fargo tried this on my sisters acct I cosigned. The insurance they sell has commissions and payback perks that Wells Fargo benifits from. Check the federal trade commision under search Placed or Forced Insurance. Often if you have enough equity you dont have to insure at all. Regular home owners insurance is covered for sure as Ive been through that one myself. Flood insurance I dont know specifically since I didnt live in a flood zone at all.
The issue of agreement to insure in original contract may modify some rights but not all of them. FHA and VA insured loans also have condictions. NO CONTRACT can force you to buy insurance from a specific source do to recent FTC regulations. So if your contract says you do, its a voided provision now. Check the FTC website for info.
Get the best offer to insure your house you can get, and send it to them refusing their insurance in writing. Dispute any charges made against your loan amount. If my experience is any measure of yours they will resist, even removing it and then reimposing it months later. It took me 18 moths and 3 times removing the placed insurance before it finally stopped reposting. Whether an insurance company will insure for anything less than appraised value is another issue, some even require 150%. Technically they dont have to. However compare various insurance as all appraise differently.
I was able to beat WF placed insurance by nearly 65%. Your conclusion that the insurance they are pushing is 300% over priced is about typical. If you read the paperwork they sent with notice it even states they get commisions on the sale, identifies them as partners even. While there are limits on commisions the b**ch is in the details where as the partnership is a profit sharing agreement that sidesteps the limitations on commisions. The majority of cost is profit in the end. This is truly a ripoff by any definition since even the FTC ventures to call it one.
Dont just give in and accept what they are doing. They already know they cant actually force you to accept this ripoff but continue trying since so many people let them get away with it.