Unhappy customer

On the 17th of June 2025 I bought a Home Square Stainless steel 1.8 Lt kettle for R199 at Boxer Whittlesea. When I opened the kettle at home, I discovered that it had dents on it. The next day on the 18th of June I went back to the store with my till slip. I spoke to Ziyanda and Ms Mlungwana and they took the kettle to the back office. They took a bit of time, and I decided to take a new kettle from the shelves and waited for them at the cigarette kiosk. Upon their return they informed me that the kettle cannot be exchanged, and they had tried to straighten the dents. I explained the group's return policy, Ms Mlungwana started to have an attitude and refused to give me the till slip back. I grabbed the slip from her, took the exchanged kettle and walked out of the store. If Boxer Whittlesea is serious about customer service, Ms Mlungwana and Ziyanda need to be dealt with. I am quite aware that Boxer Whittlesea is new, if nothing is done about these staff members, nearby competitors will still maintain their customer base. I expect to be given feedback on this matter.