Substandard product responsibility refuted

I bought a gold chain and pendant less than a year ago. The chain broke and the pendant was lost. I bought the same set again. It broke. It was replaced. (I asked for a stronger chain but was refused) It broke a 3rd time and pendant and chain were lost. Now, because there is nothing to return, the best they can do is offer a 10% discount on my next purchase. Sorry Sterns, this is unacceptable. Your product is clearly substandard. Your customer relations leaves a lot to be desired too. The poor salesman has done his best. Calls haven't been returned by customer relations, area managers, field managers. Calls go straight to voicemail. Very bad show.