Noisey fridge freezer

Question

Hi
Our Zanussi fridge freezer (4 draw freezer at the bottom) vibrates really noisily when the compressor clicks on. This is usually worse when the fridge is full, or I've opened the freezer several times in one day. The noise stops when we push and hold the fridge door firmly closed, (although the door is already closed and the seal is sealed properly) but we can't stand there all day doing that!
The fridge freezer is only a year old.
Can you help?Many thanks and best regards
Zoe