Makro centurion doesn’t deliver on their promise

I bought a cadac gas heater at makro centurion on the 8/06/20 I only used the heater for few days I then realized it switches itself off i told myself I’ll take it back when I get time since I stay far and work far today 2020/07/15 I went to makro centurion where I bought it with the hope returning it because it is not serving its purpose for exchange or money back but I was told I can’t get an exchange or refund they will need to take the heater to be checked if it can be serviced or I qualify for an exchange and I have to wait plus or minus 6 weeks to get my answer or the heater back I can’t wait for 6weeks for the heater to be returned to me in summer I need the heater now in winter hence I bought it in winter I only had the heater for a month n few days my New contact is ***