bad service and no response

We bought a 55 inch led tv from pick n pay hyper in Brackenfell in 2016. On the 9th of December 2017 I took it to hyper as the creep was black with sound and was told that it would take about 2 weeks. On the 27th of December I went back to the shop as we heard absolutely nothing from them. I was helped by a gentleman called Neville who told me that the tv was back. Took it home and it was not fixed it had the same error. I then went all the way back to the shop and Neill called a girl called Maggie who apparently us responsible for that area and she herself had no idea but I was informed that Maggie would call me back the next day and give me answers. It has now been more than a week and no phone call and no explanation and we are still without a TV. I made numerous calls to the Hyper but Maggie is never available and the phone just rings. Where is the service or its it just something they say but the service is lacking.