Bad service and a faulty phone!

On the 8th of March I visited Vodacom4u in Centurion and renewed two of my contracts. I received two new Samsung A3 models. The sales lady explained to me that I can return the phones within 7 days if they are faulty. I gave the phones to my brother and his pregnant wife who live in Fochville. Her phone has never even switched on ! We drove all the way from there to meet me in Centurion this Saturday. To swop the phone as it was within the seven days. The manager was EXTREMELY unhelpful. She stated that the phone will be sent in for repairs then we had to come back for the third time to come and collect a new phone. This is a unacceptable. The phone has never worked!!!!