Sterns Chatsworth Centre - Bad service and does not keep their PROMISES!!

IN 2019 my husband purchased my engagement ring from Sterns Chatsworth Centre, he received good service and the prices were affordable so when my bro in law said he was proposing to his girlfriend in a weeks time I didn't hesitate to say shop at Sterns. BOY!! do i regret that decision. On the 20th September a sales lady called Shiksha Kisten assisted us and we mentioned many times we were unsure of the ring size and she assured us that we could bring back and exchange the ring within 30 days or get it resized for free so we went ahead and purchased the ring. 3 weeks later - 10th October my brother in law and his fiancée went back and the lady in the front asked who served them and my bro in law pointed out Shiksha which she then insisted she didn't serve him or remember him and insisted she never mentioned resizing the ring for free only when she saw the receipt did she accept she served him and to top it off Sterns did not keep his fiancée ring size so exchanging was no longer possible. So Shiskha said she could not help them in anyway unhappy with this my husband and I along with my bro in law and fiancée went back to the store the very next day to point out this is what we was assured when we purchased the ring. Shiksha once again served us which i pointed out she had told us we had 30 days to do an exchange or re size the ring for free as this was the only reason we bought the ring from Sterns. she was the rudest ever so I asked to speak to her manager which i was then told the manager doesn't work on the weekends and I must come back during the weekday, I asked for the managers number which she said she can not give , I asked for the head office number and she pointed to a counter that had 3 notices full of writing saying i can take it from there, which meant reading through all those notices instead of just being given the number, I then insisted it was her job to give me the head office number. while we were waiting we read the back of the receipt and saw we could request a REFUND as it was still within 30 days, which we DID. My bro in law should have been told this on the 10th as it would not have required my family going back to the store to sort this out. My family and I were treated with such abruptness and rudeness from Shiksha in a store with other consumers and even when she handed us the money from the refund we never got an apology just dirty looks from her. I WILL NEVER RECOMMEND STERNS CHATSWORTH TO ANYONE AGAIN!!