Fridge claim

Fridge claim. They say pcb infested with ****roaches and affected electronics. PCB and control board are at the top. The fridge is running but the top is not cold and they say the finding is electronic infestation. I send pictures and they say they reject the claim. Now I ask them for second opinion they refuse because their fridge technician does not know Electronics because no wires were infested even on his pictures.