Proline (TFP 235 A) fridge too cold - freezes everything!?

Hi all,

I'm looking for some help in that the Proline (TFP 235 A) fridge we have is consistently too cold. Regardless of how we change the thermostat (1=least cold, 5=most cold) it often freezes items in the fridge and up to 5 cm of ice/frost collates on the back panel.

There is a small freezer compartment above and that freezes well - almost too well, ice cream is rock solid.

Any ideas how we could fix this?

Thanks!