I have an RL33SBSW fridge

Question

I have an RL33SBSW fridge freezer, for the last week the lights on the control panal have been flashing & the fridge has been freezing all the food. I was told it needed a PCB which I purchased and fitted, the lights have stopped flashing and the fridge has stopped freezing but now it isn't getting cold in the fridge. The outside of the fridge freezer used to get warm too and that is also not happening now. The appliance is only 13 months old, please help.