Warm fridge cold freezer
The user manual has this in the Control panel section (page 17):


  Temperature Control Slider in refrigerator chamber
  The temperature control slider is used to
  adjust the refrigerator and freezer temperature, the slide on the thermostat is used to
  balance the distribution of air flow volume
  of each compartment. When the slider is
  turned down, there will be more air flow in the
  refrigerator and less air flow in the freezer, so
  the refrigerator will be cool faster. For normal
  operating use, keep the slider in the centre normal position. You should not need to
  adjust the temperature control dial if the slider
  is kept at the normal setting.


Is it likely that the slider control is simply at a bad setting?

Other manufacturer information is here.