Negligence of not following procedures (bad service)

I'm very disappointed in sales ladies at American swiss Mall of africa. I was assist by a lady Boity on Saturday 14 November 2020. I purchased a engagement ring and I asked for size S. Cause i remember going with my partner for sizing. Boity confirmed when I purchased that ring is a size S.when I gifted the ring it didn't fit my partner it was very big I was embarrassed. But kept in and returned it on tuesday afternoon. When I got to American swiss mall of Africa I was assisted by Tshidi I came with my partner tshidi checked with sizing and told me it was a size U not size S. So I was given the wrong size she assist in resizing and told me I had to pay R299 to get the ring resized. I explained to her that it's not my fault as her colleague gave me wrong size. She told me there's nothing she can do about that. I request for an exchange with diffrent model but told me that the ring is damaged there seemed to be a scratch at back of the ring.so I was bot allowed to exchange. How can I scratch a ring that didn't fit in the first place. Because of Boity negligence and not check the ring size and that everything is in order before. I asked her very nicely as I was in a rush is everything in order she said yes. This is unacceptable that I have to pay for resizing and not being able to exchange I ring hardly had for more than 72hours.

Very upset customer.