Tarnished mens wedding band valued at R8000

When you purchase a wedding band for your husband, you want the best and you pay for it with no complaints. However, you should get value for your money and proper advice at the time of purchase. I purchased a 9ct white gold wedding band with black diamonds from this reputable and well-known South African store. To my dismay I was told to pay for the resizing at the store! I was not happy but figured I was getting trustworthy service so I paid a further R425 to resize the ring. We got married August 2018 and he wore his ring everyday as a good husband should. The ring started to fade to yellow around October 2018. My husband also pointed out that the shape seemed warped. He didnt understand the reasons for it, as he is a Teacher and does no kind of work that would damage the ring. So because we live abroad now, we managed to send the ring with my Mom to get an explaination from the store at Liberty Midlands Mall PMB-KZN. The staff blamed my mom for not doing research on the ring and purchasing a more durable ring for everyday use. They told her that she would have to pay a further cost for rhodium recoating and that she should have known the ring would suffer from regular use. Obviously, had she been advised of this at the time of purchase we would have spared no expense to purchase a second ring for everyday use. American Swiss however, was not helpful in assisting us on the situation. Instead of providing good after sales service. The staff kept telling her that its common for this type of metal. No one can explain the warped shape after resizing and no one was accomodating after us spending so much money on not just the one ring but also a womans diamond engagement ring. More than R20 000 was spent at this store and all we got was 'research the ring before purchase'. So what is the consultants job in the store? if not to assist and advise customers on their purchases? and is this how American Swiss treats its paying customers?