You can get a repair estimate by contacting Samsung or bringing it to a uBreakiFix location. Are you sure it's the camera and not the app itself? You can run a diagnostic by going to device care/diagnostics and testing the camera. If the camera tests fine, it's the camera app. Since it can't be uninstalled, you might have to factory reset your phone and restore your backup. There are also other camera apps in the play store that you can download and try. You could also put in an error report with Samsung or get text help.
