Bad customer service, game west gate mall

I went to return a sleeper bed(Master camp) at game Westgate mall in Roodepoort. One Valve was not sticking, when I pump in air it would come out. So I got to game at the picking desk, a gentleman was called to check the bed, he struggled with it first time then came right when he tried again, I then decided I do not need it anymore (think I'll struggle with it in future). So I tell the gentleman is it possible that you can keep it and I get a refund. He then asked a lady that I suppose is in charge. I forgot to take her name, the lady immediately raised her voice and said "if it's fine the customer must take it, we are loosing money, give her the receipt" which she threw. I was not expecting such a feedback with people looking. I couldn't stand there I left, lost R1000 with no refund. I had not used the sleeper couch, I bought it 12 July 2025, opened on the 17th of July 2025. The manner of approach is alarming to say the least. I would have reconsidered taking the sleeper if it was explained to me in a humane manner. The lady in charge's behavior needs to be kept in check!