Foremost Insurance Group Refused to fix Elderly Roof Caledonia Missouri

My elderly mother’s roof has been damaged for over a year due to wind/storm damage.  When the damage first occurred, my mother reported the damage to Foremost Insurance Group.  Each time an adjuster came to assess the damage, they sided with Foremost Insurance Group. She was informed by the claim adjusters that the leak was not caused by wind but by wear and tear.  It has been over a year, I’m sure there are some wear and tear especially if the company refused to fix the damage immediately.  Her claims have been denied several times over the years.  Now, water is pouring in my mother’s house while Foremost is collecting her money on a monthly basis.  If possible, will someone please advise me what I should do about this company?