Game Jabulani Mall can't assist with broken TV under a 5 year warranty

I bought a Sinotec TV July 2018 and 2 months back the TV decided to go black on us, I looked for the receipt everywhere but with no luck. I then called Game to find out if they can help me with just the warranty card of 5 years by the way. They took me from pillar to post until they put me through to someone at Electronics who told me that they won't be able to assist me without a receipt. My brother decided to go to the branch to find out how come they won't be able to trace the sale with a date, serial number and warranty. They told him tons of stories about it being almost Christmas time and what not. What should I do with this TV that has a 5 year warranty and I've had it for just over a year? I'm not happy with the service at Game at all it seems they are quick to make sales but they are not trained to deal with customer problems. The attitude from the staff starts at the door the employees can have a conversation in front of you as though you don't exist. They have zero respect for their jobs or their customers I even prefer driving to the Westgate branch because perhaps the problem is that the Jabulani is within a vicinity of black people therefore no one is being taken seriously.