loosing R4999 on a laptop that is faulty

I m really disappointed at game stores Parow and N1 City. I have spend almost R40 000 at game N1 city, because i've believed in their service like I believe in Makro Cape Gate. And since its the same group and game was the best place at the time to visit. I bought a laptop from Game Parow for R4999 a marked down laptop. I got home and struggled with the product took it in and the technician looked at it. A hour later called to say laptop is fixed. Just to get home to experience the same problem. I took the laptop back to purchase a brand new laptop and pay a R2000 on top of that, but the store in N1 city refused to exchange the laptop for a brand new laptop. I cant loose a R5000 on a laptop that is not working. I m really disappointed in Game as I have always believed the services of Makro and Game. I have done business with Makro Cape Gate for years and have spend to over R500 000 through the past 6 years. And as a loyal customer to be treated like this makes me really a unhappy loyal customer. I need the laptop for business purposes a business that is the lifeline of my family. I don't want a refund but want to use the R4999 and add a R2000 to purchase as new laptop which is on special for R6999. If Game N1 wont help me to purchase a new laptop I will collect a laptop that is not working. I will loose a R4999 but you will loose a loyal customer, who have believed for years in Makro. I will use social media platforms to voice my disgust at your treatment to your loyal customers.