Defective laptop from Game

I bought an Asus i5 laptop in January worth R9000, in about a week I took the device for repairs because it would lose battery life within 2 hours. In May the device stopped working again and was taken for repairs. In July, 3rd time I took the device back for repairs but this time I demanded a refund. They fixed the device in-store and wanted me to take it back. I refused to take it because I fear that within 6 months I've had to send it 3 times for repairs. The product is obviously defective but the store doesn't want to own up, instead they always look to blame me for their defective laptop. This has been a horrible service from Game. I just want my money back!