Insurance

I took fnb insurance not knowing the underwriter is old oldmutual and I recently had a claim for my roof which was damaged by the storm . Old mutual came with the excuses under the sun to pay little as they can . They insist I am under insured and my property is in the market going for half of what I have insured it for. I am going to move my property away and insure it its my other property. The quote they got from their supplier and my supplier and compared to what they are willing to settle it's an insult.