Hifi Corporation's service is horrible.

I've bought a set of Sensui bluetooth headfones from Hifi Corporation in October last year. I then took it back to the store in Mitchell's Plain as the one side was not playing. The cashier said that the slip is faded and she requested a reprint from N1 City where it was purchased. N1 City didn't answer the phone. The cashier then spoke to the manager about the situation. She came back and said there is nothing she can do but keep on trying N1 City. At that point we were already almost an hour in the store. My wife then requested to speak to the manager. The manager then came in there with an attitude that stinks telling my wife "you don't scream at the staff". Not even saying hello nothing just start going off. My wife told her that she's not screaming and that she has a loud voice which she can't help for. At that point I could see the manager (Shamiema ) have no clue of how to interact with customers. If she had a management degree she would have known how to deal with the matter. She then said very uprupt there's nothing she can do. She said we must take the headfones to N1 City. I said no I'm not going to do it as I might as well just throw the headfones in the bin. From Mitchell's Plain to N1 City and back via R300 is 74 km's, which I was not prepared to do. Then she said she is going to replace it I must choose a set. They didn't have bluetooth headfones in that price range, I then asked the money back and she said no I'm not giving your money back, the slip is too old. I ended up taking something I didn't want just to get out of the store. I am buying from you people for the last 17 years and never had problems. I bought all my stuff including car audio from you people and then this is how your staff treats me? Is it my fault the invoice is printed on cheap paper and faded? Shamiema will cost your company big time believe me. If she had to work for my company she would have been fired long ago. My boss do not tolerate such behaviour. She have an attitude that stinks and don't know how to talk to people. While I was in the shop I heard she told another worker how she don't like a certain fridge as it breaks easily. I mean, how do you diss your product in front of customers. She's very unprofessional and it doesn't take a rocket scientists to notice that. I will never buy from you people ever again.