POOR SERVICE

I bought my ring end of November 2020, but I started to wear my ring end of January 2021 2 months down the line the stone fell out, I took it back they repaired that for me because it was still under warranty, then after 2 months again another stone fell out which concerns me. they then send it for assessment and the report came back saying the stone fell out due to customer negligence because there is screeches and I might bump the ring somewhere,(that concerns me because if I bumped it and it is in a good quality then the stone wont fell out every 2 month's). and I was told that they can’t fix it for me I will have to pay a portion from the cost which I do not agree sins the ring is still under warranty I asked the manager why do I have to pay because it is still under warrant and sins I did not pay on the 1st repair and the response was it is because it is due to my negligence, what concerns me is the feedback I am getting from the store manager and the area manager they are conflicting each other and it is like they are not sure of their policies