American Home Shield AHS AHS Denied a claim

I filed a claim with AHS regarding a leaky hot water valve in our downstairs bath.

The contractor they sent looked at it and told us he would order parts and replace all 3 stem valves. Mind you the center valve or diverter valve was NOT a problem.

When they missed the window (the next few days) to come back , I called 2 times and requested an update. No reply. I checked the AHS site to find that the work order was completed. I re-fiiled the WO. Once I did that the contractor (Mr. Rooter), finally came back and replaced the stems.

When he was gone, the next AM I showered fine but noted that the stems were really tight to turn. Thinking nothing of this I continued on.

My spouse informed me, 3 days later, that the diverter stem was leaking. ½ the water was coming out of the shower head and ½ out of the valve stem.  I placed a n additional service request.

Mr. Rooter came back to inform me that the entire fixture was to be replaced (not covered by AHS) because the diverter valve need replacement. They would now need to remove a wall in our eating area to get access, a ~ 1500 job.

Our diverter valve was working fine until Mr. Rooter tampered with it. AHS has sent a denial letter today.

I contacted a professional licensed master  plumber to inspect the work in the near.