usb lead pointing to computer on iphone screen

Hi there this is my first post on here so not quite sure if I’m doing things right, hopefully I am, my IPhone 8 has been playing up more or less since day one, the battery power runs out within 2 hours if i use my phone even just for a call, we were told to do a factory reset which we have tried to do but now all we are getting is this image on the phone and when it’s connected to iTunes it goes through all the steps to start the restore then it comes up with error 9 can anyone help as now I don’t even have a phone thanks 🙏