Do you know what is making the noise?
In a fridge the moving parts are the compressor (which compresses the liquid refrigerant into a gas), the condenser fan, (which cools the condenser coils), and the evaporator fan (which spreads the cool through the fridge/freezer).
The evaporator fan is in the fridge and stops when you open the door so I don't think that this will be the problem.
You have to get behind the fridge where the compressor and condenser fan is located and listen to which one is making the noise.
Once you determine what is making the noise, if it is the compressor for example, you can decide whether it is worthwhile to get it replaced, or repaired.
Also maybe you should check the warranty and also the warranty period on your fridge and see if it is still valid. Some manufacturers give a 5 year warranty on some major components in the fridge. e.g In Australia the Samsung warranty for refrigerator compressors is 5 years and refrigerator inverter compressors is 10 years but for the fridge itself is only 1 or 2 years depending on size. (under 200L or over 200L)
Here is a video of a compressor (not your model) just to show you the way it works. It is probably more noisy than it should be because the cover has been removed.
Hopefully this is of some help.