2018 and purchase cannot be traced

My fiance purchased a sterling silver ring for me in june 2018 and we had to have it resized. A month after he bought it the ring started going black where they resized it. We went back and i understand that he did not have the receipt but it had only been a month and we got told that they cannot trace the purchase without a receipt. 2018 i kind of expect that they would have a system in place. Anyway.... 4 months later and my ring has snapped where they resized it..... i am getting married in Feb 2019 and at current i do not even have a engagement ring. Very dissapointed as just months before this purchase i had spent a huge sum of money at that same store for gifts. Sterns Greenacres in Port elizabeth will not be seeing me again