weFix battery, we break screen

I took my iPad to them to replace the battery, it was swollen. Apart from that everything worked, especially the screen. After they installed a new battery, there are parts of the screen that are not working. They refuse to acknowledge that their “technicians” were responsible for damaging the screen. Replacing a swollen battery without damaging an iPad’s screen is a known procedure. There are Youtube videos on it. Stay away from them.