Contracted Katrina Laur to work on my boat. Boat was pulled out on 7/11/22.  Tuesday work began. Katrina's brother installed the zinc.  I tighten the zinc above the prop because I lost one in the past.  They sanded and painted . They left, I checked and the bolt behind the prop was stripped. Notified Katrina, stated they would be back Wednesday.  Didn't call or show on Wednesday.  I texted her, she stated  be back Thursday.  Katrina her boyfriend, and her dad Tim Laur showed up on Thursday.  Tim fixed the stripped bolt.  I inquired if the bolt was helicoil. Tim accused me of telling his son to overtighten the bolts, and that's why one stripped out. He stated if I touched the bolts it voids warranty. I checked the bolt, it was tight. Katrina came yelling and swearing at me they quit because I disrespected her family.  Tim has 35 years experience and I need to trust his work. She threatened she would make sure nobody at Boatworks would work on my boat. Shocked at this vendors behavior.