Disgusting customer service from Manager at Legit Mall of Africa

Good day, I would like to file a complaint on the horrible & poor service I received from the manager of the Legit Mall of Africa branch today. I went to the store around 13:25 to go and exchange a pair of heels which I received as a birthday gift that did not fit, bare in mind I went the the previous day and told them that I would like to do an exchange but I don't have a slip and they told me as long as the shoes are in good condition I'm welcome to, hence my visit today. I proceeded to go to the till and told them I came in yesterday, they looked at the shoes and punched in something on the system and told me I am welcomed to take anything for R200 as the original price got marked down, I looked around the store and found my items that I wanted to exchange and went to the counter. The manager was standing behind POS and I told her these are the items I would like to get as an exchange. She punched in something on the system and asks where is my slip/tag, I told her that I had spoken to them yesterday and when I walked in and nobody had an issue, she then says we don't do exchanges without a slip or tag. I told her it was a birthday gift and I don't have such, she says she can't help and dismisses and ignores me and proceeded to ask for the next customer. The other sales assistant then spoke in vernacular language which I understood and said maybe she can search another store to get the tag and the manager mumbled back. She proceeded to tell me that the only place I can go to is Pretoria cbd. I stay in Midrand so I can't. I was completely ignored by the manager as if I was a piece of **** or a dog. Her service is absolutely disgusting! I work in customer service, and that was nowhere near 2 star customer service. How am I supposed to go home with heels that don't fit me. I would expect an exchange to be done with or without a slip.