Ecpensive Low quality rings- 9ct - sold. Changed colour and shape in a few days after purchase. AsJ won't take accountability

I bought a ring from @AmericanSwiss liberty mall end of Oct 2025. 1 week it started to change colour, I took it back 1st weekend, they cleaned it and said it's normal. 2nd week/ week after, when I took it off it had changed or lost shape, the stone had fallen off, luckily I could find it. Took the ring back again, they sent it for assessment and today 11/11/25, they tell me I need to pay for the repairs. They say excessive force has been put on the ring that's why it changed shape- i know for a fact that's not true because it has always been on my hand/finger and I have never come across any force...they would never admit their fault as they would have to pay/refund or give a new one..I am so disappointed! My wedding ring! Not even a month and the ring is returned twice. The ring is of low quality for the amount i paid. Seems like the store is not willing to resolve this in the most meaningful manner. No sane person would use excessive force on there few days old ring thag they paid for

To make things work the manager said they can't take it back as its not original form it was purchased. How is it supposed to be in its original form if its quality is poor?