UNFAIR TREATMENT FROM A JEWEL SHOP

I bought 9ct earrings from the above mentioned shop on 30/08/15. They were taken from display, she did not explain how to put them on, nor was i advised about insurance. I paid R749.00. They packaged them in a box. I trusted them and naively took them without asking i could notice that they were desperate to sell at home I found that there was no backing to close them. I called the shop to find out how . She just told me that i should come in to the shop. It is a distance from where i lived and could only go on a Sunday after church. I decided to try them on, and walked around with them. when looked at the mirror again one earring was missing. i went back to shop on 06/09/15. only to be told that there is a butterfly backing on them. No one can notice them if you did not know about them, unless you are told. Because they are not visible at all. i am not even sure if both earring had the, because i did not know that they are suppose to be there. They wrote a repair invoice and took them in. and would be notified . A lady called me the name of Taslin on 07/09/15. who was rude . She told me that I was negligent. I feel unfairly treated. And want a refund, or exchange.