Hi,Welcome to Just Answer, My name isXXXXX will be helping you with your appliance issue today.
if you pull the refrigerator away from the wall and remove the bottom access panel you will see the compressor, (black ball) on the side of it is the start relay. you can replace this yourself, it just plugs on the 3 posts on the side of the compressor. can you get me the serial # ? they had a huge recall I'll see if yours is on the list. thanks Bryan
The buzzing is the compressor start relay that failed,