Samsung SR-S2028CSS fault

Hey guys,
My Samsung SR-S2028CSS has developed a fault.

Everything had been fine but we noticed last night that the fridge didnt seem very cold.
The temps on the front display read correct, we have them set to -21 and +3 for the freezer and fridge.
I noticed that there was no noise whatsoever so i turned off the power at the mains switch and turned it back on and the fridge motor cut in and but the temps read +1 and +14 (eek)
I left it alone and the temps went back to normal -21 and +3. Got up this morning and the temps on the control panel said the correct temps of -21 +3 but again, the fridge didnt feel very cold and there was no noise.
Flicked the power switch off and back on and again the motor came on and the temps were both +.

Yesterday, before i first turned it off and on i am pretty sure the freezer temp was flashing if thats any help 😕

Can anyone help please?

Thankyou 🙂