Defected products

In July I bought a Cadac Saffire heater from Makro Cape Gate. After a week, it could not self-ignite. I took it in some time in July and was told they had to send it for repairs. They fixed it. However this time it not only the self ignition issue I had encountered but the combustion was not a powerful as before. When taking it back the second time, I was told to wait another 21 days as it would be sent for repairs again. They refused to replace it or refund me. They also told me that they would NOT ask the supplier to prioritize fixing my heater. They said I had to keep on bringing it in 4 times before they could consider replacement or refund. The heater has since completely stopped working. What kind of customer service is this??? We are in the middle of spring and only enjoyed my heater for a total of 1 week. Today, I've just realised that the 2 lanterns bought from the same store are not working. I am so not looking forward to taking these products back because I know that they are not bothered.