Disgusting treatment from manager

Good day

I'm very upset at how I was just treated as a longterm customer by the manager by the name of Wendy at westgate mall Ackermans. So I took a few items for my little girl and came across a jersey on the marked down rail that clearly shows R11.90c as you can see on the sticker, when I got to the till the cashier then confirmed that it's R119 I then asked to speak to the manager and they told me that it's R119. I then told her that I would like to pay the price that I see. She then rudely said and I quote "you can mos think it's not that price and you just being unreasonable to want it for R11.90" she then tried to ******* the price and before she could I told her that I'd like to take a picture this is why the sticker looks peeled. She then proceeded to ask me where I work as she saw my work uniform, which to me should not even be asked as I'm a paying customer. I work in westgate mall but don't treat any tenant different when they step into our doors. I would like this to be sorted out immediately as I would like to purchase the item at the price that I see on the tag please. Also can someone send the manager back to training as she doesn't know how to speak to a customer, wherether I work in the same mall as her or not.