Violation of customer rights and poor customer service

I went to the Fix mams mall today and the level of service it was very poor and hurting, the lady by the name of Agnes which I believe she's a superior inthe store was very rude. I went to the store before today because I had a laybye, I wanted to cancel it then she told me to provide the slip then I went back to my place since I felt like I'm making her life difficult to process everything with ID instead of the laybye slip. It took me 2 months to look for the slip and still I couldn't find it since I relocated from my previous place to another. I then received sms to inform me that laybye has expired, I went to the store today to get something with the laybye deposit that remains after their 10%penalty fee which I understand, then the cashier who was willing to assist me after I explained to her that I lost the slip, but I have sms with ref and also want to use the money to purchase a top for my Lil sister. Agnes middle in our conversation with an attitude and asked me if the sms I received is the slip for laybye can she be able to print it out. I then told her to stop disturbing me with the cashier since it was not the first time treated me like that. Today it was worse because everyone was staring at me embarrassing in front of everyone and even told the lady who was assisting to not ask for authorize from her since I fight her. The cashier she couldn't say anything back because Agnes she's rude to her staff members and customers. She really needs training to deal with customers and staff. She's was very unprofessional to act like that and I even left the shop because she told me that she won't help me instead she will assist customers behind me. Agnes at The Fix mams mall