The screen turned yellow after the fall

My phone has been falling to the ground, and the screen has turned completely yellow. The protective glass shattered, so I removed it and discovered that the screen glass is still intact. I wanted to replace the screen at an authorized service center (the screen price is €400), but because the back glass was already damaged beforehand, they refused to replace just the screen. They insisted on replacing both the screen and the back of the phone for €700+. Therefore, I've decided to take matters into my own hands and seek your assistance in finding where I could purchase a cheaper screen (whether it's a replica, original, or used, as long as it functions optimally). Could I possibly use a screen from another iPhone?