pathetic service

My mother took 2 Samsung j1 phones on contract Friday 23-10-2015 the one phone keeps freezing, when playing games u get kicked out and returned to the home screen and when reciving a call the camera flash flashes I phoned the store on the 24-10-2015 and spoke to Fiaaz who claims to be a manager he told me that I need to bring the phone in and they need to send it away. When I complained that the phone is not even 2 days old I was told not to complain cos my mother shouldn't of tool a bottom of the range phone if she was not happy with the features. We like the phone but not the issues of it freezing, camera flashing on a call or being booted out of games. I was going to go over to cell c once my contract with another service provider ends but after this pathetic service I rather stay where I am. According to the consumer law if a handset is faulty with in 7 days of purchasing the device the store concerned is supposed to replace it there and then not send it away for between 7 to 14 working days and inconvenience a customer.