Royal Termite & Pest Control

My parent have had a contract with Royal Pest Control for 30+ years. The inspector comes out, strolls around property for 15 minutes, never goes into basement or garage leaves and has never been seen to come back and spray in over 20 years. They say the come out a later date, but don’t you think in 20 years and mind you neither work and they have a dog, they would have seen them or heard them at least once? Well bottom line, 30 years later they had to replace the roof and found termite and carpenter ant damage, so bad that the main beam holding the roof up was almost gone. Live insects found too. Royal said not responsible for damage, denied any insects found and even claimed they come out at later dates and sprayed house humm… Even told them the termite were silverfish, really silverfish? Also she found woodworms and Royal tried to tell her they were some new insect they have never seen before and had no idea what they were, she found them on Google. He’s the expert and had no idea what they were?