Hello
I have an Ariston fridge freezer. I turned it off for a few days while I was away and since I switched it back on (2 weeks now) it has not regained its coolness. THe freezer section is cold fridge temp and the fridge section is only slightly cool. It is 6 years old.
A compressor isn’t possible unless you happen to have a load of gassing and brazing (or Lokring) equipment to do it.
The ice ball can also be caused by the same, I’d give you a 90{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} chance that it’s the compressor. 😕