Defective laptop and refusal of refund

Bought an Acer laptop from game, south coast mall. It has been sent away to be repaired twice , it has been in for repair longer than I have had it. SSD fault was the issue first time. Git it back , that same day , other issues started. They refuse to give a refund. Insist I keep a laptop with faults. It's in for repair again. According to them, as per this morning, Acer is trying to fix it. First time it was in for repair for three weeks. Now it's over a week. It's clearly defective. But they refuse a refund. It's still under guarantee. Not to mention the disgusting customer service you get in store. I will NEVER support Game South Coast mall again. And I will never buy an Acer product. I will also never refer any to that game store. Or suggest an Acer laptop.