Worst after sale service from Cape Upholstery

In June 2018 we got our couches re-covered by Cape Upholstery. When we received the couches back we were told and as per invoice received that we have a 1 year guarantee on the work done. In November 2018 I informed the owner (Maudy) that the one couch started to tear by the seam where they stitched it. I was then told that they are moving workshops and she will inform me when they will collect the couch to do the repairs. Time went by and I did not get any feedback from her. In January 2019 and again asked when they will be collecting the couch. She did not know what I was talking about and had to remind her about the couch again. We then decided to rather drop the couch by the workshop in Strand on 09.01.2019 as this would make the process of repairing the couch quicker after this has been dragging for almost 3 months. We then received the couch back on 18.01.2019 and on 22.01.2019 I informed her that the same problem is occurring on the same couch which to my surprise her reply was - OK. On 28.01.2019 I informed her that the seam started to tear completely again (exactly the same as the previous time). On 01.02.2019 I asked her what they are going to do to repair the couch by which her reply was that they are going to fix it again the same as last time and that she will inform me when they will collect the couch. Once again almost a month went by and still no reply. On 22.02.2019 I asked her again "when will they collect the couch?" and the reply I received was "Morning, I will let you know". On 13.03.2019 I asked the same question as no "I will let you know" answer was received yet. I was then told that we must bring the couch in any day and that they are now in Elsies river. We feel that from our side we already did more than our share as we paid in full for a service which is now becoming a problem.