Refund Policy - Consumer Protection Act

Bought a Romoss Power Bank for R599 at Cellucity Walmer Park from a sale person Louis de Villiers at 15:10 - I walked into Cape Union Mart and asked them what their brand of power banks cost. Their unit was the same cost as Cellucity. But they had a larger capacity unit for R799 that could charge my phone 4 times and my laptop as to the one purchased that could recharge my phone only 1.4 times. I walked back in the store at 15:25 and asked the (I'm doing you a favour) salesman If they had a unit with bigger capacity. He said they did not have. \In that case