Wrong goods/pricing dispalyed

Yesterday (18/10/2018) I went to Game Fourways to purchase a Home Theater. I found 1 of the workers there and he showed me the products they have, I saw 1 for R4499.00 and said I wanted to buy that 1 and that guy went and called the other guy who works in that department (His name is Sakhile Jali),I explained to Sakhile which 1 I wanted and then he went at the back and came back with the box of that Home Theater and gave me a piece of written paper to go to the till to pay, The lady at the till (Her name is Sophy Matuosi) helped me with the transaction and when I was supposed to sign the slip I notice it was R5499.00 (R1000 extra) and I asked her about it and she said I should go back to Sakhile and he will help me with that. Sakhile told me that the 1 I payed for is the resent model, I told him I don't want the new model I want the 1 I saw on floor for R4499 and he said they are out of stock even other stores, he called the manager (Her name tag was inside out) whom she just said to me "Ausi we don't have stock, either you get a refund or go home with that 1". It's so ********* for Game to treat people like this, you can't display something you don't have in stock and mislead a customer to buy it and only explain the situation after the transaction.