Part of my phone screen is not working do I get a new screen or do I have to get a new phone?

I have a 6S plus iPhone and I dropped it and now part of my screen isn't working when I touch it. Do I get a new phone or just repair it's screen?

At this point, the iPhone 6's are way too dated to try and spend money to fix. I would recommend just getting a new phone. Get the 7+ or the 8+ and you'll be good to go!