Poor quality service.

I bought a wedding ring about 3 years ago from Sterns at Carnival Mall. Within the first year one of the diamonds fell out and I had to return it back to Sterns to have the ring fixed. Had to pay for the repairs even though it was a design flaw. The ring was never bumped or physically damaged in any way. The repairer also confirmed this. Less than a year later, the same diamond has fallen out again. I took it back two weeks ago to have same ring repaired yet again. This time they have quoted me a R1400 to fix a ring that has now failed twice. This is extremely poor service. I informed them I will not pay for the ring. Went in on Saturday to collect the ring and now no one knows what happened to the ring. Please stay away from Sterns at Carnival Mall, extremely poor service and they don't care about customer service. Once sale is done, they forget about you.