Pathetic after service from Tafelberg furnitures.

We bought a microwave that according to their systems show it was delivered on 30 November. Not even a month later the plate breaks. I call them on the Friday it breaks and they tell me the plate is not under warranty. Surely though it is not supposed to break after having it for less than a month i tell the salesperson (this never mind the fact that we also purchased like more than 5 other items also by them at the same time. The lady then informs me she will send it to one of the people who work in the microwave department and they will call me back the Saturday. No call on Saturday. So i call back on Monday and a guy answers and says he will sort it out for me and call me back later in the day. No call later in the day. I get a call Tuesday morning, i ask the lady can she call me back in 5mins i am just in a meeting quickly and she says sure she will. 2 hours later no call back. I call again and the new lady says oh we must bring the microwave back. I'm like now you can say that after 3 calls? And I'm not going all the way to the shop only for you to give me some excuse as to why you cant replace it when I'm there I would like it sorted out over the phone and once I get confirmation of what exactly you will do will I come in because I am not wasting my petrol. She says she will call me back in 5mins. its been more than 5mins.