Racisium and undermining attitution from Coloured

I was at Makro around 12:00, because I bought a microwave last week, the microwave is now not working and so I was senting back that microwave and that microwave was the 3rd one because the first two was not heating and this one also does the same and but at first works and after did not works. When I went there and I told them that I can to brought back their microwave and because it not working,so they must give my money back and before I say anything and a black guy just say yooo you also bring back this microwave and there is a lot of whites and indinians who were here complaining with this microwave...after that the guy who was helping he then tasted and it working and I told him you know what because I am scared may not work again please makro must give me my money and I will get another microwave else where...he called and coloured guy he was so called a Supervisor or Manager...That guy was very rude and ****** and he said they cannot take back the microwave because it working and they have tested...I told him it not working and what must I do because it not working and he said I must speak Zulu because he does not understand what I am saying or maybe I am failing to explain in English and I did explain the same thing and he said to no we cannoy take it....you have to keep it.... I told him no you need to give me my money back....he said no we cannot and you can see he is very undermining and ****** when he said all of that....but last week when I was there and a white old lady brought back a microwave and they took it without asking anything....also a week before I saw any Indian guy brought back a old machine and a lady on the side she even said that this machine is discountinued but she was helpd and when it a white person they even pay him/her back petrol at Makro and if I am lieng Peter you can do you own research about what I am saying and I am very angry and disappointed with Makro.