If the freezer is working but the fridge section isn't then its looking like a fault on the sealed system side.
Now to be honest on this it isn't worth fixing as its listed as a 1995 model so nearly 20 years old. And a repair on the sealed system side is roughly about £200. So for that price it isn't worth fixing.
If you feel the compressor at the back you will probberly find its hot to touch. This is a sing the compressor is faulty.
Sorry this isn't good news but if you need anymore info just get back to me.