No response or fixing of gas leaking fridge

We bought a fridge in January 2015. Went to Makro on the 9th June back to complain about bad smell. Salesperson told us that its a gas leak. It will be fixed within 48 hours. We switched off the fridge as for I have a 4 year old. The gas leak can be bad. We've been struggling with my mothers small fridge for almost 2 weeks now. Everytime we phone Makro its just email that they sent to the supplier. I really cant go on like this. I must drive everyday to town to buy milk cant buy for the whole week cause dont have enough space. If they say 48 hours it has to be a fridge is a very important item in the house. Please help