bad service/ bad product

I have purchased a GHD straightener on the 20th of July 2014 and it is already faulty. The straightener just stopped turning on. When I first got it I got a new plug put on and I also made the cord shorter and now 6 months later it stopped working. I bought it at Mannequins in Middelburg mall. The saleslady told me that I was allowed to do this as long as I leave the barcoded tag attached. I am very disappointed with GHD as I payed a lot of money for this product - expecting that it would last a long time. I emailed zanele and she told me that the courier would get into contact with me within 48 hours, it is now a week later and I am still waiting after I had asked her whats happening several times. I hope that this issue can be resolved soon as I really need my ghd back in working order.