Poor Customer Service

My phiance bought a chain with a pandant for me at American Swiss in Pheonix in April 2023 and I loved it and it was beautiful, however in May it started changing color and it was so new and my phiance went to the store he bought it from and they sold him the cleaning kit and he gave me the kit while we using the Kit for the 1st time the chain became worse and the pandent had gold sparkles and they fell off the pandent and he had to take ot back to the store and when doing so he encountered an issue that she and the store supervisor ended up using words on each other , however i called the store and I was given a number to the regional manager whome I called and before I could explain further she already told me that she has made a decision that we should pay to clean the chain and the reason the chain chain changed color it was because it was miss handled as a customer I was told that there is nothing that could be done and before she could even see the chain and take it to the manufacturer she concluded even when talking to her since I was calling her from the recorded line she dismissed me and told me the person that could call her was my phiance who bought the product and are hung up and my phiance waited for her call but nothing until he called the customer care line and was given a case number but after a week he got an SMS saying the case has been closed thank you , and no one has contacted him whatsoever and when calling the call center they open a case again as we are in August 5 cases have been opened and closed but no resolution until the regional manager said she could assist by sending the chain to repairs and my phiance will pay for the costs and he agreed just to close this matter and when picking up the chain he was told a wrong chain was recieved by the store he should come back for the right chain and after a week he went back to the store and was given a chain and was told they cleaned it but they did not fix the sparkles a d they charged him R450 and they told him that is all they are willing to do, As a owner of the chain I'm disappointed with this whole situation and I wish we could treated like customers that matter to the business and the regional manager is so Rude and Arrogant.