Why is my refrigerator is not getting cold at all ?

First thing to do is pull the fridge repair mississauga out and clean all the dust and lint that has collected on the back of it. Take the vacuum to it after the surface lint has been removed. It might just be that the compressor is not getting proper air flow. If that doesn't work it will depend on how old the unit itself is. Repairmen are very expensive and so are parts. Might just be time for a new energy efficient one which will save you money in the long run anyway.