[Resolved]  Reliance Jewels — Poor Workmanship of Diamond Ring

I had a bad experience with Reliance Jewels recently. I purchased a precious diamond ring for my mother on 3-Jan-15. Within 3 days o[censored]sing (regular routine and no exceptional workload), 2 diamonds went missing. After reporting to Reliance Jewels, Nasik on 7-Jan-15, they informed that they would send it for quality check and assured that as we had reported the problem within 7 days of purchase, we would get a free repair and replacement for diamonds post the formality of QC check. But after 15 days of follow-up we were informed that the QC report says the ring was hammered. When its a genuine case of poor workmanship towards diamond installation, Reliance Jewels is trying to put the blame on the customer who believed in the Brand, the quality of its the products and their Customer Service. But after the bitter experience my impression of Reliance Jewels is toiled. Can anything be done to avoid my loss?