Makro TV Return - Given the Runaround

Before purchasing a TV we were told by the store TV rep that it has 16GB of memory. When I received it it only has a total of 4GB. Furthermore the backlight distribution was not consistent throughout the screen. For these reasons I decided to log a return with the call centre, the day after I received courier delivery of it. It has now been a week and I have received no response from them. I call the call centre almost everyday and am told things ranging from 1) they are busy processing the courier to fetch, 2) the supervisor will escalate issue with the store, 3) TV does not qualify for a 14 day money back guarantee. This service leaves a lot to be desired and does not inspire much confidence in me as a customer.