Aggrieved Customer

I wish I could give the Midas Fourways Crossing a Zero. I bought a brand new battery from them after exchanging my old one for a new one . I paid around R1600 for a new battery from them which they assured me is new. I used the battery on my car for the first time .It worked the following day when I started my car the battery was not functioning (dead). I went back and asked them for a refund and queried why the battery did not work when it’s within a two year guarantee and if it’s supposedly new it should be operative. They refused to give me a refund and said they would charge the battery and will call me after a week. This wasthe beginning of December and I am still waiting for them to get back to me. I went and they said they will call me again and they still have not gotten back to me it almost the new year and I still don’t have a car battery. Is this how you treat customers and pensioners?