Gorenje KE267MLA Fridge too warm

Question

Hi,

I have a gorenje fridge freezer model KE267mla (HZDs 2526) the freezer over freezes all the time and the fridge is never the right temperature no matter where the dial is.

The dial in the fridge goes from 1 to 7...which one is the coolest setting 1 or 7 ? there is also a switch with a red dot on it..what is this for ?

Many thanks
Julia