Gold fading

I bought a set of rings(Serenity ring) on the 25th March 2026. I realized today that the gold is fading and I sent a WhatsApp enquiry. Am being told it gonna cost R700 to fix both ring that i used for 7 weeks. Warranty is 30 days. This is pathetic and actually going to throw away this ring. Shein probably has better quality than this nonsense!