Help! give or take a few fridges and freezers? I have bought a latest 'frost-free' fridge freezer, it has be working...

I have bought a latest 'frost-free' fridge freezer, it has be working fine for the 1 few months but recently the freezer isn't working properly i put rime lollies and ice cream within the freezer but it doesnt seem to work properly approaching a normal freezer would, the rime lollies would melt and rime cream all melt

what could the problem be?
Fan switch making buzzing jingle. What is wrong?
Answers:    it may be something blocking the airflow to the bottom of the refrigerator.clean the coils trade name sure the fan motor is running.
You own warranty if it is new.
Seal or not to trademark?
Check to see that you own the freezer temperature setting right.