DEVICE CLEARLY DAMAGED BEYOND REPAIR

I went to Maponya mall to collect my phone from repairs again today. The guy helping me suggested I take the phone home with a flat battery which I refused &asked him to charge. An hour later I came back &the phone had charged to 6%. While he was re-installing apps, the phone died. I left it there for 30 minutes &when I came back it had charged 6% &the employee wasn't there so I decided to take it home. The phones dead yet again and won't charge, it's clearly damaged and at this point I'm at a loss!<br> As per the CPA I agreed to have the phone repaired, within the 6-month CPA warranty period, and it 'broke' again. Twice. I cannot accept another repair. By law, as the consumer, I either get a full refund or a replacement. Correct?