Dropped phone, broke rear facing camera

My phone brand was not an option, so I chose the closest. I own the Galaxy J7 Sky Pro s727vl.

I recently dropped my phone and the rear camera shattered. Unfortunately, now both rear and front facing cameras do not work. How do I know if both are broke and need replacing? Or if one breaks, does the other just stop working? Also, where do I find replacement cameras? I can't afford a new phone right now. The rest of my phone works great.

Can someone please help me with this. I need my phone camera for my job.