Broken/black camera not working

My iPhone camera has been doing this on and off now, where I have a completely blacked out screen when I go onto my iPhone camera and any other app using a camera, I’ve rebooted my phone, hard reset it, reset the phone, deleted all my apps, reset apps, everything under the sun. I can’t handle this anymore, it’s been blacked out for 15 hours or so today and it’s driving me mad can any one help me please :(