Disgusting service - unable to do return

Today, Saturday the 8th of February 2020 I had a terrible experience at the Southgate store. I purchased a shoe for my 5 year old yesterday, the 7th of February and took the item home. We fitted it on and realize it doesn't fit too well. Today I went to the mall specially to return the item, as I am well within my legal rights, and was promised by the staff a cash refund within 30 days. Upon requesting a cash refund, the lady helping me, who later refused to give me her name, didn’t want to entertain my request at first. After a few minutes of telling her that I do not want the shoe and want a refund, her last excuse was that only the manager can facilitate the refund. But, apparently the manager was in the bathroom and we had to wait. After 20 minutes of waiting, we asked again, this time we asked another staff member. Her, also didn’t want to disclose her name, said that the manager was on lunch! So we went back to the First Lady who said she’s in the toilet and asked if there was anyone else to do the refund, and she seemed irritated. She still refused to give me her name. I asked if she could call the manager, as we were going into 30 minutes with no one being able to help me. Also note, this was at 4pm. The First Lady walked out of the store, and the second lady started laughing. I asked what the managers name was, and the lady there kept saying that we don’t need to know. After an argument about my right to know her name, she went to a book to see what the managers name was. Not too sure if it was even correct, but apparently she needed to see her managers name from a register. The store manager’s name was finally given to me as being Mavis. After another 10 minutes, I left the store. Still unable to do the refund, and the manager not returning. I am totally disgusted with the service and the attitude of the staff.