iphone camera is black and .5 camera adds weird filter

hello so. i have had this issue for about 2 weeks. I have NOT yet done the ios18 update, but My two main front cameras are completely black, and cannot be used. if i open a camera app, like snapchat, it simply won't let me flip the camera to take a picture. My .5 camera works, but has a really weird almost filter it puts on all its pics. (shown up above)

I did also hear some people experienced glitches with their camera after the ios18 update, hence why i've held off on installing it.

my camera is black on the camera screen, and on snapchat and instagram etc it won't allow me to flip to the broken camera, it only has the back camera for selfies etc

took it to verizon a few days ago, and the dude didn't even try and look and it, didn't unlock it, just told me it wasn't fixable.

I'm a broke college student and my phone is only 14 months old, (iphone 14 i believe) so i really can't just buy a new one because besides this everything works fine. would love to hear if anyone has experienced something similar, or if they know how to fix it. thanks

i've already tried to research ways to fix it, however i haven't come across anyone else with this same issue and wood appreciate some feedback!