Poor workmanship and no after sales support

We had our kitchen redesigned and installed by the company, just a little more than 12 months ago. We noticed that the wine rack started to show serious defects. I emailed the owner Marlize Esterhuizen on 6 Aug 2018 asking her to send her people to my house to mend the problem. She answered me on 8 August promising to do it within 2 weeks.

It is now a month later. Despite follow-up emails and a telephone call, she is ignoring me flatly and it seems that she is not willing to take responsibility for the poor work that was done.