HDMI visibly faulty manufactured cable not warrent

I bought a 10m HDMI cable and installed it the next day, It seemed to be fine but after about a week the customer informed me about the TV screen going off intermittently. On my first visit on site I could not determine if the TV, cable or DVR was causing the problem, but it was still working. After a day or three the customer complained again and on investigation I realized it was the cable not functioning unless it is kept in a certain position. I phoned Matrix about the warranty and I was told there is no warranty on the cable. I then carefully removed the rubber outer sleeve to see if a wire on one of the pins was faulty. I then discovered that all the wires was molded in plastic and one of the pins was noticeably shorter than the rest. It seem to be a visible manufacturing problem. I took it to Matrix in Alberton but was told that I had to return it within one week for them to book it in to the supplier and also since I opened the one end they would not replace it. So the long and the short is that since the cable did not go faulty within a week, and since I opened the cable insulation although it is visible faulty manufactured It is my problem not the suppliers.