Smeg stained sink - no service assistance

I am so disappointed with Smeg. I bought a sink in January that stained immediately at first use. I reported this and after having to buy their paste x for R270 and using it on the sink first before anyone would come to the house to investigate the sink. That did not work, so they sent a technician, who also could not get the stains out withthe same paste and more products. By this time Smeg had received 3 sets of photo's of the stained sink and nothing happened. I then follow up again, and they then wanted to send another technician out, who was going to use paste x once again. Why do you need to come twice to see a sink that is stained? I have done what you asked. Bought an expensive cleaning product. Used it. Your technician came and used it. My cleaning lady since then uses it and the stain is still there. It is more than 3 months that I have reported this and no one has helped me or gotten back to me! I have requested a replacement and have recieved no response from Sean, Daryl Ingle, Zanelle Scheepers or Nishelle.

The service is shocking. No one is getting back to me.