My front faceing camera is green when i use the flash (iphone 6s plus)?

My friend dropped my phone and the whole screen smashes really badly, so we took it to the repair shop and replaced the screen with a original apple screen (thats what the guy said he will use) but not, when i take selfies with my fromt facing flash they are green tinted. Is this the problem with the new screen, could it be fake? Or could the camera get damaged during the fall?

You need to return it to the repair shop since more happened to your phone than a smashed screen

Transfer the images to your computer. If the shots look green there too, then it's not a problem with screen on your phone. It could either be a bad camera module ($8 off of eBay), or just a setting. Check the auto white balance setting and make sure it's set to auto.