A very upset aunt/and now use to be customer of Ackermans

My sister's son bought a phone at Ackermans a samsung which he paid R2000 for barely had it a month and it didnt want to work anymore took it back in to the store waited 2 weeks and went back to find out what the problem is because no one informed him what so ever came there and they tell him he must pay 2700 for the phone to be fixed!!!?? What the??...he paid 2000 now he must give another 2700 for a phone thats was most probably faulty when they sold it...he bought the phone for his college work he didn't walk with the phone on him because he was gun pointed for his previous phone so this one was in the cupboard and when he comes from college he takes it out how could he hace possibly broken this phone and nogals internal