Faulty Aircon – No adequate after sales support

Bought an aircon unit – shortly thereafter it stopped producing cold air. Despite having caused installers to refill the gas twice, the unit is still not producing cold air. Makro has failed to respond to my enquiries and/or has been slow to respond. When Makro responded and/or could be reached, they provided contradictory and/or vague responses: i) was first told that the unit will be picked-up by the store where it the Unit came from; ii) when I heard nothing was told that a technician would come out; iii) a technician did not come out and was then told to provide the “document” of the person who installed; iv) When I asked what document and why, was then given an equally vague response that I need a ‘COC’, without an explanation why – still waiting