Faulty product

Purchased a generator at makro in December 2018 because of loadshedding then the starter locked in January 2019. Mind you loadshedding takes place for few hours meaning it’s hardly ever used so I took it back to them they told me I should pay R1200 to get it fixed I told them I can’t pay for something I got a month ago from makro now they telling me they took it to Ryobi and I must pay the quotation I would be happy if this was after atleast 2-3years but I can’t buy an item a month ago then it fails me within two months then still am expected to pay for repairs. This means it’s going to fail me forever and I would rather take it back and get a different kind or a new one because it doesn’t make sense to buy something and it breaks within a month, worse they say they cannot do otherwise why and how.