Distasteful Service from Store Manager

I have since bought a Samsung 65 Inch from Pick n Pay: Princess Crossing. It was faulty, then I called the Store General Manager who Is Mr Radebe. He refuses to answer my calls or e-- mails. I am afraid to take it back to the store since I am afraid of what ight happen en route to the store. This Mr Radebe is so elusive he would rather send a store clerk and stand behind him telling him what to say than to speak to me directly and hear me out. Please Help