Sterns Bad Service and Products

I went to mall of the south on 14 April 2018 with a ring that i purchased 7 months ago. the one stone fell out. I am extremely upset because just after the warranty expires, the product breaks and i have to spend more money to fix it when i know it was a manufacturing fault (As this is the 2nd ring i purchased in less than a year that looks exactly the same). I feel that this is unacceptable as i spent A LOT of money just to hear a "sorry mam the warranty expired" and you have to pay for it.