iPhone 14 Pro screen not responding to touch after software update
I bought this phone from Facebook Marketplace, it was in excellent condition and everything was working fine. A few days later I had a notification for a software update, After ive updated my phone I realized that every time I open up the camera app it would start to lag very bad then after a few seconds later it would stop lagging. A few days after that my camera started to lag to again and then it froze, I pressed the side button and it took me to my lockscreen but literally after that the phone wouldn't respond to my touch. I did everything I could even a hard reset and still the touch wasn't working at all. I even restored my phone and STILL the touchscreen wouldn't respond to my touch. Just yesterday the charge ran out, and after I plugged my phone to charger the phone turned on and this time my touch screen was finally working but then an hour later it stopped working again and not respond to my touch!! Can anyone please tell me what's going on? What do I have to do? I dont have apple care or insurance because I bought this phone from someone else, and it was working amazing. Just after that update it just started to lag and eventually the screen isn't responding to my touch
iPhone 11, iOS 17