BAD SERVICE, INCOMPETENCE AND NO STOCK

I was in store yesterday 11/07/2015 to open an account, they told me to come back tommorow morning 12/07/2015 to make my purchase. i was there just after 9:00 and struggled with the account, after 11:00 my account was aproved and told them i want a 55' Samsung led 3D tv, i went to the front and payed the tv, when i went to collect my tv they told me they do not have stock and they told me that they had stock the day before NO PURCHASES IN BETWEEN The staff member told me that i must take an LG where i ask him why they do not have stock on something thats on promotion, he said that they just orderd 3, 1 on display and 1 missing and 1 they kept for a client that was still busy paying where i was the first one in line. where is the missing tv? I then asked for the manager where he also suggested that i take a LG because they do not have a 55' Samsung in stock, I WANT A 55' SAMSUNG The manager then said that he will refund me R500 if I take the one on display but its full of scraches,a tv of R14000 The manager then garanteed me that I will have my tv on tuesday 14/07/2015 because they get the orders tomorrow and will only dispach on tuesday. This will be my last deal from Game ever.