Horrible experience from Telkom and Platinum Warranty

I am very appalled by this insurance. We bought a Mecer Laptop via Telkom last year Oct/Nov. Ever since receiving the laptop, we had problems. We sent it away to be fixed, guess what something else is a faulty again,so again we sent it away, according to them fault is fixed. Received the laptop again and wow the laptop is faulty again. I'm so fed up now, wasting my airtime and my breath over the phone. They don't come back to me, I have to call to follow up. What else can I do please, where can I report them to, they wasting my time and I'm paying for something I never really used. Telkom doesn't want to help me either, they referred us to Platinum Warranty as they are the insurance. Telkom says they only make the sale, no after sales customer assistance. Horrible service I am telling you