Disgraceful treatment of I Store customer IPad

I have a nearly 6 months argument with I store pavilion which sold a young man a IPAd M3 that is not fit for purpose. When we returned it within leas that 7 days they refused a refund wanted to test it “away for.is in their environment” then obvsioluly claiming there is nothing wrong. And I if we want to a refund they keep 20%. Totally ignoring South African law. This is causing huge amount.of sstress on an already ill young man and might cost him his internship. They don’t care. They are a horrible store.