The Andover Companies

I talk to my agent 'bout my high premium for my homeowners ins. policy. The Andover Companies ins *** had my house listed at *** square feet premium at $1313.84 which they took from my escrow account. My home is listed at just under *** square feet, so I have been overpaying for approx. 5 years according to my agent. My home was reinspected by Andover and found to be just under *** square feet. Andover adjusted the square footage of my home and gave me a new premium of $1090.50 and refunded me a check for $123.86. This refund is too small it should have been for $223.34. Plus, there should be some compensation for overcharging for approx. 5 years, the mix *** in square footage was their fault, and my agent tells me they Refuse to reimburse me for this mistake. I am retired and live on a fixed income, so I watch all my pennies, any help you can give me in this matter is greatly appreciated.