HELP! My Samsung RL41WGPS fridge/freezer isn't cooling (Fridge compartment)?

Hi, I have a samsung fridge/freezer, model RL41WGPS, I believe it was purchased late 2008 or early 2009 (I can't remember exactly). Back in july the fridge compartment was not cooling. I put it in the garage and a few months back plugged it in to have a look and it worked perfectly. We just moved house and decided to use it again and give the fridge we had been using to my mother. This was 2 weeks ago and this afternoon I noticed the fridge compartment is no longer cold and the fridge temp gauge on the front is flashing. Any help or advice would be greatly appreciated considering it's christmas day and I'm skint till the end of Jan!!