So many possibilities to list.
A defrost timer may be in the bottom front, can be turned to take it out of defrost cycle.
The compressor top may either feel hot too touch or a line is frozen, time to unplug it and defrost it a day or two.
Fan motors may need oiling or have bad bearings...

Hi
sounds like the freezer part has an ice blockage the clicking may well be the fan chipping at ice and no air flow will mean the freezer is partialy working yey not allowing cold air to fridge
if this is the case to proove point give unit a good defrost for as long as possible then turn unit back on
if this works it will require a service engineer to check the defrost cycle of the unit is no longer failing
good luck