Poor Service

I bought a Superfly C-type adapter at MTN bloemfontein Nelson Mandela Drive and it didn't work with my Iphone charger i took it back and they tested it with cheap iphone charger and it worked and refused to give me a refund. When i demanded my money back they shouted at me and accused me of lying. I went back home tested it again and then the next day went to istore took the adapter and charger with me and again it didn't work. I would not recommend to go to MTN. Really Realy poor service.