Bad Customer Service

I went to Pep Stores - The Grove to exchange gifts that I received for my baby shower and obviously u don't receive slips the lady helping me at the till told me that they do not exchange without a slip I tried to explain that it was gift but she was so never minded that I eventually ask for the manager. I then spoke to YVONNE who they called as manager not sire if she is as her badge didn't say anything. I was so irritated with the way she answered me she literally told me I can't exchange without a slip and she walked away no customer service at all. J am really disgusted with the staff and the service. Because what should I now fo with duplicate clothing all the other shops exchanged my gifts without a slip only PEP that would not after telling these ladies atleast the tags are still on and not like I wanted money I just wanted something else. Really poor customer service and will also now teach myself to not buy any gifts for people from them because they won't be able to exchange.