MTN CANAL WALK - TERRIBLE SERVICED

My 5S iphone had a screen problem & since it was less than a year old I took it back to MTN Canal walk. They promptly told me that they cannot accept the phone unless I brought the charger. So I had to go back to them with the damaged phone & charger. Waited again for more than 45 mins, I was finally helped by someone who logged in as Niyaaz Burton. This person spent about 30 mins doing all sorts of things including disabling \find my iphone"& then gave a barely legible paper as proof of handing in the phone. He told me that they would call me in a week. It is now about 3 months since my phone was handed over to them and I still have not heard anything. I have been back to the store 3 x and each time I asked to speak to the store manager"