Sub-standard products sold by Pandora South Africa

I bought a necklace with a pendant from them at the Mall of Africa store toward the last 3 months of 2022 for close on R3000. It’s only been 13 months and the neckpiece has been stained. I sent an email to their customer care regarding this issue I’m having, even attempt to make a few calls to no avail. Alas the email has still not been responded to let alone acknowledged. I feel that they are ripping people off with their jewellery as this was not the first neckpieces I bought from them that has done this. I was of the view that the first neckpiece stained and discoloured due to the amount of medication I’d been taking after my hospitalisation. The fact that the second neckpiece has done the same thing, proves to me that the South African market is being sold sub-standard products at very high prices and when you contact them about their products you simply get ignored