Makro Brakpan poor service from exchange department

I bought a Sinotec TV exactly a month ago suddenly the TV shows blue strips on the screen when turned on that isn't suppose to happen to a brand new TV. Phoned makro on Tuesday kept on the line for a long time just to tell me the exchange department doesn't answer my call. Switch board lady took my details and said someone will phone me back and that it is possible for someone to come out to my house and test the TV and see what's wrong. Waited a few hours got a call from exchange department said I must bring the TV in I then told her the lady at the switch board told me you can send someone out uhm uhm was the lady's response and said she will call me back at 3 o clock got the call at about half past 3 where she took my address and details and said she will send someone out. Next day I got a call from the same lady telling me she can't find the invoice of my TV I mean really how can that be possible it is suppose to be on the system. I got my slip out and read the invoice and pos number to her and that was the last I heard anything. Tomorrow it will be 3 days and still no one has come out. I am very disappointed in the customer service that I have received so far from Makro with my faulty product. I will never buy from Makro again really if this is how they treat their customers am I suppose to wait another month for service? It's pathetic