Front camera not working

So I have a IPhone 7+, but my front camera won’t work in any of my apps , Snapchat, instagram, tiktok, FaceTime it just shuts the whole app down and I have to re download the app and still won’t work. I just bought of my friend another iPhone 7+ today thinking my phone had been dropped to many times and this one is doing the exact same thing!

I have factory reset deleted re login in and out and yet front camera won’t work

please help!