Terrible customer service and left with a broken ring

I bought a ring from Browns. Although it was a while ago, the diamond fell out and they made the gold crack. I took it into the Sandton branch and it was sent away to the workshop. More than a week later I get feedback, that they can't do anything. Supposedly it's an old style that they don't make anymore, and don't have any need to fix it. I asked what else they could do as clearly Browns is not solution orientated. Why do I have to ask what other options to fix a ring that they made. I still haven't heard back from them as the ring was supposed to be sent back to Sandton. I also contacted Browns on email asking for an escalation, and well, quite frankly some customer service. No response a week later.