For me, you have "natural" lighting inside the store (behind the clerk), and very yellow lighting in the foregound. The fg is very very busy, with all the small olives, and the colors are muted, which reduces the contrast between the different shades. Also, the clerk's lower lip / face looks strange and he's looking vacantly out of the shot - not at his wares or the camera.
This looks as if it was taken at night using only available light, so good job. I would be interested to see a 'daylight' version to really show off the various colours of the produce.