Iphone 5c camera not working?

So a while ago, my phone's camera stopped working because of storage problems. I could usually get around this by using the snapchat camera to take me photos, but two weeks ago my snapchat camera stopped working also. I realized that most of the storage in my phone was being used up by photos and camera (2.5 GB in the photo library) So I transferred all the photos on my phone to my macbook and deleted all the photos on my phone. Despite this, my phone only gained a few MB of storage and my phone is still saying that photos and camera are taking up over 2 GB of storage. Neither my snapchat camera or my phone camera work and I now only have 10 downloaded apps on my phone, none of which are taking up much space. I don't know why my storage is still really low, even though I don't have any photos on my phone. Can someone tell me why this is happening, and what I can do to fix it.

Added (1). I have done things such as turning my phone off and on and resetting it multiple times. I have also tried to delete and redownload snapchat but the camera is still black and doesn't work.

Turn it off and on again…

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