BAD CUSTOMER SERVICE VERY BAD QUALITY

I am very unsatisfied with their service and quality. My boyfriend bought me a cute necklace for my birthday in October 2022. This month i saw that 2 of the diamonds fell of, so we went in to Sterns, Kolonnade, my boyfriend lost his slip but he did buy it on is account and they keep record on the system, okay so we went in and from the start we got HORRIBLE SERVICE they did not want to help us, "could not find anything on the systems" and were very very rude to us, after standing and waiting an hour, I also got rude and oh so quick she got friendly with us, I walked out of that shop in tears, the she spoke so nicely to my boyfriend like she was never rude... She called him the next Monday, and said no they found the slip we must please bring it in.

We take it in now they can not fix it but I must choose another one, why can't they fix it?

I don't understand how they can sell something they can't repair, why does it only last 5 months when the price is so high?

How can you treat your customers so rudely... I will never buy from sterns again...