Lifegem.com review: Bad experience

I found out lifegem.com website and bought diamond ring from them. Only later I found out that they sell diamonds, which were made from cremation ashes and hair. I was shocked and surprised as well. I contacted the seller, because I can’t wear such jewellery, but they refused to take back the ring and sent me compensation. Maybe someone had the same experience and can advise me what to do. Thanks!