iPhone 6+ home & Touch ID won’t work after screen replaced or IOS 12?

My iPhone 6+ 128GB Space Gray is running on IOS 11.something. It don’t have that “Touch disease” it doesn’t have that white or gray flickering on top of the screen but it has ghost touch where it touches itself because its bent. I know this is my fault because I go to a local phone repair shop and got my screen replaced for $50. It’s not a black screen, its a white one so the screen is white and the home button is black. The home button and Touch ID is working perfectly. I updated it in the last version of IOS 11 and its still working but when I updated it on IOS 12 (not beta) after 5 days, the home button and Touch ID won’t work. I thought it was a software issue and I waited for IOS 12.1 and I updated it, but still won’t work. I don’t know if its a Software or Hardware issue. If you have suggestions in trying to repair this. That will be a BIG help. Thanks.