Game selling used/returned Items

Game Bayside selling used Broken Applicance We bought 3 Big appliances from Game and a Display Unit Samsung Dishwasher. Moses confirmed a few times after we asked that this is a Brand new Dishwasher only it is out of the Box and it was on Display. Returning home, we discovered that it is no working giving a LE error, Leakage error. after trying to clean and dry this NEW dishwasher we estabished that there were water in the machine and Salt in the Salt container already brown in colour and rust on the side of the drain.Machine would not work and after phoning Moses that tried to assist us, Mr Naidoo his manager refused to help and wants to give us just a refund after we insisted that this is unacceptable as we live far away from the store, we will return the maching on condition that it is replace with a New or Display Unit Metalic colour it does not matter the brand. Mr Naidoo refused to phone me back after requesting that I want to speak to him. We support Game alot and if we were in the market for a second hand machine we would have bought the machine second hand. I have lost my Trust in this store. Has nobody had this issue before or had to speak to a manager with an attitude.